I had a TURP in mid-April. Recovery was long, about 2 months, maybe a little more.
I don't know about a TUIP.
Prostatitis can be really, really hard to treat. If you had it, they wouldn't have done the procedure, so you must have contracted it afterward. Sometimes, one prescription isn't enough.
All the sitting can't be helping, but there is little you can do about it.
If you think that you are taking too long to heal, and that the doctor is treating it lightly, see another doctor. It has been a long time for you.
Good luck with this.