If I had strong feelings about a coach truly not being a good influence, I'd take my kid out. And I'd insist on a refund. However, it would be my decision not my kids.
Sue, I think you might need to add some prayer to this and I'll put in my btdt with a 10/ds 2 cents.
Lessons, sports, clubs and things are going to get more focused and intense now. No more adorable little kids running around the soccer field while the coach smiles and no one keeps score. This is a good time to try things on a short time commitment and find what he enjoys, is good at, needs etc. hth