Don't get me wrong, I'm on the winning side just as much as losing...it's not like she's always on the opposite team.
The idea, is from my experience and it's not new...at gold/plat she is BY FAR the most impactful hero in the game. It simply requires a very skilled hitscan to take out an average Pharah.
During group formation at the beginning of the game...there will almost always be talk about the need to counter a Pharah. People will not necessary start the game with one, but there is talk about who will need to change if there a Pharah on the opposite team. You rarely if ever see that for any other hero...but it comes up almost every time about Pharah.
I still enjoy the game, and I may come as whining more than intended...but she simply has too much of an impact right now...win or lose. I mean even when the Pharmercy combo is on my team and we win, it's boring that 1 hero out of 23 has such a big impact.