At a certain point you just have to acknowledge and remember that MTG is a game for losers, outsiders and people with other disorders (social or whatever) and that such an environment is naturally prone to deviant and insincere behaviour. This fact, next to the game's dependence on RNG is the reason why treating MTG too seriously or regarding it as legit "competition" is and has always been laughable if we were honest. I'm pretty sure that most of the so-called pros have some way or the other the shape the game's odds to their favor.