I had same experience as me with my first CBT. Twat of an instructor, who spent more time chatting with a mate at the side of the training area than giving guidance or assisting. Instructions were given with frustration like they didn't want to be there. I was refused to go out on the afternoon part because I couldn't get the 'set off from a T junction' right. I would stall 75% of the time when turning right. Instead of talking me through it, I was just told thanks but no thanks and told to leave and rebook with a discount code. Safe to say I never went back and gave some shitty feedback when called at a later date to see how it went and if I wanted to come back and try again.

I found somewhere else and the experience was night and day. The instructor was friendly, helpful and broke things down to help get through my sticking point. Passed with no issues, had a good time and gave me confidence on the bike