He may have well cheated, but there is no evidence to suggest that. Again, the Muricans and Strayas seem to think they own the pool (and they do in a lot of competitions), but the way the guy and his coach conducted themselves (especially the coach) and came out hurling accusations, it's just ridiculous. You lost, so fucking deal with it.
If I'm salty, then your swimmer and his coach, the way they comported themselves, are a gazillion times saltier.
I'm sure if Chalmers had lost to a Marchand or Caleb Dressel, we wouldn't be hearing negative comments from him or his coach, only congratulatory messages.