Many health problems, can make a person feel tired, not well rested, thyroid, diabetes, vitamin deficiency, etc..... stating virtually never remember dreams suggest you should have a sleep study done.
My experience I felt the same as you, I would tell everyone, I felt like the walking dead, yawned all day, just going through the motion, had to take naps, never had any dreams, or remembered any, I had sleep study done, given cpap/mask, made a major difference in my life, every night I sleep now, I have really long dreams, wake up feeling refreshed, unless my other health issues, causes fatigue. At first I couldn't stand wearing a mask, tried many different ones, till I found the perfect one, now can't live without it. Yeah, sometimes I get freaked out, cause I'll have some super long dreams, and I mean long dreams, opposed to not having dreams at all. All I'd remember is going to sleep, waking up.
Have a sleep study done.......... Wishing you well.
The unrefreshing sleep is a red flag for apnea. You should get a checkup and bring all this to the attention of your doc. Yes, it is could also be hypothyroidism or a number of other medical or psychiatric issues as well, including a just a simple mistiming of your circadian rhythm.
You should also be confident this can be fixed.
could be sleep apnea. kinda rare for your age, but deff not unheard of.