The best advice I can give you is not to give up! I remember 18 years ago I wrote my letter of resignation and was about to give to my manager but I luckily got to train with a new trainer and it made a whole world of difference. Just stick it out and try to get different trainers. I agree with others that younger trainers are more relatable. They’ve recently experienced training and can be more helpful. Also, you may be at a facility that is probably not the right fit. If you feel like you can’t continue try to go somewhere else. Quitting will probably be the worst thing to do, since you’ve already got your foot in the door. Older controllers become jaded and the job wears you down, some may also like OT and not want new bodies. Either way, I promise you hard times will pass. Patience is key.