I've been there before, and I wonder if you're experiencing the same thing I did. I had a look at your profile pics and you have learnt an impressive amount of stuff very quickly and with some nice lines too! That, plus how you mentioned you enjoy learning new tricks makes me wonder if you're very achievement-oriented like me?
What I found was happening was that I started being too hard on myself and getting very focussed on learning new tricks, and progressing. I'm naturally quite self-critical and I started comparing myself to other, better polers and getting frustrated that I wasn't as good as them. I suspect this all had a lot to do with frustrations in my non-pole life as well.
What I did is make a very strict rule for one practice that I was going only do stuff that was fun. No goal setting, no "shoulds", no strength practice, no drilling weaker skills to improve them, no trying stuff that I feel I should be able to do but just can't get (helloooo knee hold). Just doing whatever tricks I felt like doing and doing goofy dancing to the music.
If you do this kind of practice every day you won't improve as quickly as with more disciplined training. But, it will keep you from quitting. You might find you don't care about more disciplined training and just want to have fun every session. Or, it might reconnect you with you love of pole, so that then you can start setting goals and being more disciplined again without being so hard on yourself.
The other thing you can do is just change up the kind of training you're doing. So if you've been learning tricks, switch to learning how to freestyle. If you've been inverting a lot, switch to learning booty-popping or getting flatter splits. Or something like that.
Hope that helps :)
