DanceNumberFuxx
For real, though. If you wanna play pyro in 6s join a team and play against organized players. Running a pyro/sniper/spy in pugs takes advantage of the chaotic nature of a pug and boosts their effectiveness. That's why people don't like it.
Which is fair up until a certain skill level. The meta exists the way it does because it is meant to hard counter any deviations from it, something that even moderate skill level players should be able to do. If they can't then maybe there's some worth to Olgha's argument.