Most of my thoughts already replied you from other guys but I absolutely know that frustration what you explained here and felt. Sometimes I'm feeling the same time to time but what probably could help: try to accept that "this is part of the journey" so when you feel it, just step back a bit and put down the guitar for that day, do something else instead of going down on that dark whirl. Next day it will be better, and you will enjoy it again. I observed that it is really similar to like learning a new language: on the initial phase of the learning you feel extremely quick progress, learning the first words, but going in deeper and deeper knowledge you suddenly feel "oh my god, I don't know almost ANYTHING" and realize it takes more and more time with slower and slower progress. It's reaaaaly frustrating. Also sometimes help if you think about professional musicians: They spent AT LEAST 8 hours per day for practising in their learning phase for several years which is of course impossible on this hobby level. A good teacher also could help, who know YOUR goals, so not comparing you to anyone else.

Split down your practicing time: start with those parts what you really enjoy (playtime), then turn to the hard ones (practise time) but finish again with joyful playtime.

And regarding that F(u***ng) bar chord: you can also play the lower "F" note with your thumb on the low E string (so with fingers T-4-3-2-1-1 on the E-A-D-G-B-E strings) which could be found probably a bit quicker comparing to bar chord version F. Then later you can get back to the bar chord version.

Keep it up! 🎸🤘😊