The main issue seems to be that your astigmatism wasn't addressed during surgery, though they could deal with it now.
Your post seems to imply that perhaps you expected the cataract surgery to not alter your refraction, or hopefully to at least improve on it if it changed. One thing you might not realize is that the sphere correction before cataract surgery has no bearing on the correction after cataract surgery (other than that those with high prescriptions are more at risk of the lens power choice being inaccurate). They replaced your natural lens with some unknown lens power X with a new lens whose power they needed to take an educated guess at. If you had perfect vision beforehand, they are trying to guess at a power thats essentially comparable to the natural lens you had that will give you the same vision afterwards. If your natural lens power gave you poor vision, they try to chose a lens power that will make it better.
The refractive error afterwards depends on how good a guess they made at the lens power. Although on the surface it looks like yours is off a bit, as I'll get to later, it may actually be a fairly accurate result. The IOL power should be on a card they gave you. Its likely somewhere around 21D or so given your eyes were likely fairly close to using an average power. The problem is there is no way to determine the exact lens power needed, they use a formula based on statistics about eye measurements and lens powers for past patients to take an educated guess. Usually the results are fairly accurate for those with low prescriptions like you had, but not always, some people's eyes just don't match the statistics as well as others. If the lens power is off by 1D for instance, then it is a smaller prescription than someone who had a large one before surgery, but might be a larger prescription for someone who didn't need much correction before surgery.
You mention that they gave you "monovision lenses", by which I assume you meant monofocal lenses, i.e. lenses that focus at only one distance (unlike a multifocal). However since you use the term "monovision", although you the lenses were meant to "correct for distance", I'm wondering if they talked about doing monovision for you. Perhaps they intended to correct at least one eye for "monovision" which is making it a little bit myopic to give you some reading vision. So Its possible they targeted distance, aiming for 0D, but its also possible they targeted at least one eye to be slightly myopic. I've seen some surgeons comment on targeting even the distance eye for -.025 rather than 0D to reduce the risk that if there is an error, that the eye will be hyperopic (since that reduces near vision, while not providing any benefit in exchange). An error of -0.25D tends to not reduce distance vision much, though it depends on the person how much (I have at least 20/15 vision in an eye with -0.25D sphere, -0.25D cylinder).
Unless they explicitly tried to correct astigmatism, usually that will remain after surgery. They can either correct it via toric IOLs that correct astigmatism, or via using an incision that causes the eye to reshape to reduce astigmatism, or a combination of the two methods. The incisions used to replace the lens also cause the eye to reshape, they call it "surgically induced astigmatism". Where they locate the incisions, and how large they are impacts whether the astigmatism is in the same direction as your current astigmatism and makes it worse, or if its opposite it and makes it better . These days the incisions are small enough its not much of a factor if they don't wish it to be, but good surgeons try to plan the incisions so they cause the existing astigmatism to be reduced, rather than adding to it. It looks like your surgeon managed to at least reduce your astigmatism a bit.
Before surgery you were on average slightly hyperopic in one eye and myopic in the other. Astigmatism means that the lens power in one direction is different than in another, and the cylinder power is the difference between the two. So prior to surgery the power OD went from -0.25 in one direction to (-0.25 + 1.75)=1.5D in the other direction. That means the average power was (-0.25+1.5D)/2 = +0.625D . For OS it was from -1D to (-1 + 1.5) = 0.5D for an average power of (-1 + 0.5) / 2 = -0.25D. The average power, the spherical equivalent, can be calculated directly as sphere +cylinder/2.
Unfortunately astigmatism reduces visual clarity overall, though it can also extend the visual range a bit over the range the eye's power varies.
After surgery your spherical equivalent is myopic in both eyes: OD=-0.25D, OS= -1D, with the astigmatism unfortunately reducing clarity. They can usually use an incision after cataract surgery to correct astigmatism, which doesn't change the spherical equivalent. (though a surgeon would need to be sure this would work for you, that there isn't something atypical about your situation). Its a minor procedure some surgeons do at a slit lamp since it is only on the surface of the eye and doesn't require entering the eye like cataract surgery does. If they corrected the astigmatism via incision, those spherical equivalents would give you fairly good distance vision in the -0.25D eye, with the other eye giving you a bit better intermediate or some farther out near. Unfortunately the correction of astigmatism via incision is something that relies on statistics also, since not every eye reshapes the same in response to an incision, but it'd likely make a difference. That would leave you needing readers for near, but perhaps having decent distance&intermediate without correction.
What I need to answer your question is your complete glasses RX sphere, cylinder and axis for both eyes before surgery with your best corrected vision and your complete glasses RX post surgery with sphere cylinder and axis. Be sure to include the plus or minus signs before sphere and cylinder.