Scumbags like you make me sick
lol your reaction is exactly why I occasionally use it.
I actually haven't used that loadout in months though...I probally should do that now
But seriously it's easy to counter that loadout in 1v1 scenarios:
Good scouts can pretty easily dodge your 3 rockets while shooting you in the face.
Against other soldiers you'll have to hit all of your shots or die - same with Demos.
Pyros basically hard-counter you.
Unless you manage to point-blank heavies you're also dead.
Want to destroy sentry nests? Yeah good luck with that.
Plus effective rocket jumping is almost impossible and Medics would (should) rather uber the sniper than you [because you don't deserve it].
Of course it's a super annoying loadout to deal with on pubs because
you just won't die but it's clearly not OP.
Also people should stop whinning about the Black Box. I used to do the same but seriously it's just a stupid crutch for Soldiers who suck at rocket jumping and who need more room for error.