I don’t know what his number of TA has to do with anything. I didn’t know him personally. I’ve had to reason to hate him so far.
If you are capping enrolment at 50, you have no reason to have a TA if you are a normally competent prof. You only need a TA if actual marking and meeting with students is infra dig
It’s like refusing to work more than 24 hours a week at a burger joint because you’re only got one slave to help you out.