I used to do karate (I'm chinese, pretty standard I guess) and got to orange belt but quit not long after that. I quit cos the place was a joke there was far too many kids and not enough instructors. There was 4 instructors to about 30-40 kids and maybe 5-10 adults some times.
The adults got instructors and I was being instructed with a 14 ish black belt kid and like 10 other kids pissing about (the kids was split into groups to train with the older kids). It also annoyed me that kids that young could get to black belt and still be shit. He may remember all the stances and moves but there was no concentration or power/effort in him ever. He can move his arms and legs in the right way but it looked floppy if you understand me.
From time to time I did get pull aside by a proper instructor for some one to one training which was great but that rarely happened. After I quit I threw away all my kit and certificates, I felt like they didn't mean anything, I just waved my arms and legs about in the right order and places and passed in minutes.
If I ever wanted to learn some form of martial arts, I'd pay a bit more and train with proper instructors that take it seriously. The place I went to didn't feel disciplined at all, in the martial arts way, not in the dirty way,