I found myself in this EXACT rear bulkhead seat situation on a Canadair regional mini jet once.
I (and others)consider me mostly sane, and a seasoned and relaxed traveller. But I eventually lost it to the mental torture of the physical discomfort.
That last row seat does not have the normal non-reclined seat back angle of the rest of the seats to start with - you are sitting bolt upright. Add to that the heat radiating from the mechanicals behind the bulkhead, and the fact that the cabin AC doesn’t much affect the rear parts of the cabin.
When that next-to-last row seat gets reclined, the person (me)in the last row seat can put your thumb on your forehead and fan out your fingers and your pinky will be touching the seat back of the inconsiderate recliner traveler - there is a seat back literally in your face.
In my experience, i dealt with for a while, trying to take my mind somewhere else. I eventually lashed out, verbally and a punch or 3 to the seat back. Definitely not a normal thing for me. And I wasn’t drinking.
Bottom line, be considerate of others with your desire to recline your seat. And NEVER find yourself confined to the torture of that rear bulkhead seat, especially on regional jets which are small to start with for bigger guys. That last seat is unsat for all but kid-sized folk.
Seat back? I thought that was a place to rest your hands.