You're still missing the point, the players don't play in the environment of a specific faction, they play in the space of all factions and their interactions.
Many changes caused even pro players to change what faction they mained. I'll concede some pro players managed to win matches in environments where it was considered a terrible match up for them. They're also pro players.
I do think there's a tendency to be over dramatic about the changes but the comparison with Starcraft is a bad one. Nerfs can remove all solutions to a given situation, and no adapting can solve that.
The 5e rules system is why I've been unable to finish the game, I just can't get past it.