That's fine. Of course people play sports for the competition and the "battle". But what's going on with the OP here is not the cherished battle on the court, it's one side of a story that sounds a lot like whining about a team and calling them "cheaters" just because he feels they are too good. That's the kind of mentality that we see here that people are complaining about. If there is a team that is that good, you can still "go to battle" and cherish those memories without whining about it. We see this all the time here. Everyone who is better than someone is a "sandbagger" but that person is fine at that level, or in other words, the level should be defined such that that player is the best person at the level so he can win his pen. That's not in the spirit of competition at all, it's just whinng that there are people better than you.
IF it turns out that this captain or his players falsified self-rating forms or didn't get appeals approved to play at that level, OK, fine, they should be dealt with. But we don't have a single iota of proof of that at all, just a bunch of complaining about "cheaters" and some other non-USTA league that doesn't mean a hill of beans. If you're not the best at your level, that doesn't make everyone who is better a cheater.