You should text or mail the coach a lot..late at night.

It’s Recreation Soccer for crying out loud. Players are not serious players and the coach is not a serious coach either. It’s for pure fun.

First you complain to your SO. Clearly that won’t work, so one by one you complain to the other parents. Then you mount an online socia media offensive about their results record. And then in the end you smear the players on an anonymous forum.

How do you fire a rec league coach? They are all volunteers.
People will put up with almost anything to avoid having to do it themselves.

She should have been, a long time ago. No one else will take the job.