This is true. Felt that way in my last LTR which I ended 9 years ago. We had too little in common after 10 years on and off. Mismatch. Need a foundation to build on. A dog, weed and my house just didn't cut it.
Been there, done that wasted 33 years hoping it would get better.....
I did it for far too many years. Never want to do it again!