Interruptions can prevent you from going into or staying in deep sleep.
-have you had a sleep study done?
-have you measured your snoring/breathing to see if there are problems (possible apnea)?
-have you measured your heart rate during sleep (possible bradycardia)?
-have you measured body position during sleep for clues to why you are waking up?
-any experimentation with bedroom temperature?
-bedding material?
I also considered the blue light effect at night disrupting melatonin production (I have not measured this effect). I have found that color change LED lighting that mimics incandescent when dimmed to be more soothing than regular dimmable white LEDs. Sylvania sold a Sunset Effect LED that dims to orange with no blue light. I use these in my bedroom. Philips has something similar, but doesn’t appear to go as far into the orange. My iPhone also drops the blue at night and I believe there are apps for the Mac to do the same. You can try Blue Light Blocking Goggles to see if there is an effect on your sleep patterns (I didn’t see much, but it wasn’t a rigorous test).
There are also medical approaches to tuning sleep architecture (eg low dose doxepin) but a possible link to dementia takes it off the table.
Bottom line - going from 15% deep sleep to 40% deep sleep (measured with my Zeo) did not result in a miraculous improvement on how I felt the next day.