When you climb into the ring, it can be a lonely place, but the fight starts LONG before that.
For me, having a great team, that you trust, that you believe in, that believe in you. A team/coach that are there in the training gym pushing you, encouraging you, travelling with you, warming up with you, wrapping your hands, ensuring your safety fighters records, gloves, weight ect) as well as sorting out the fights (& purses) themselves makes (IMO) the Fighting MUCH easier, especially when your just starting out and learning the ropes.
Having those things in place can help the Ring seam like a much more fun place.

If your coach don't enjoy the fighting side, to some extent its his loss but ultimately its his choice and he does have a business to run.

Leave, but leave with a handshake, a smile, a thanks and a "see you again" Surround yourself with positivity, enjoy the training, learning & fighting for as long as you can/want to.

I know some more "fighter orientated" gyms do take a cut of your purse, that's down to the choices you make in your gym/coach selection & if your getting what you want out of it.... then it may not be such a bad thing.

Anyway Choke Dee in your fighting.