ADC's cant 1v5. Supports can't 1v5. But bruisers get slightly ahead and they 1v5. How is that balanced when one class can do that and the others can't? Bruisers get slightly ahead and can 1v5 games.
Why is it allowed that one class can solo carry games but other classes can't? Can we balance the game.
i havent seen any bruiser actually 1v5.
the best i see on occation is a 1v2 if the bruiser is already extremely fed. ive seen the same by certain mages, and a lot of marksmen.
youre exaggerating, or your teams play like shit.
"mages can't 1v5" 
hides in a bush
"assassins can't 1v5" 
Hides in a bush
"Tank's can't 1v5" 
IS THE BUSH
Define what a bruiser is?
Don't tell me darius because frankly darius is easy to deal with if you're ranged
I have yet to see a "slightly ahead" bruiser 1v5 ever.
You can 1v5 on any non-support champ if you are actually a league above your elo.
But people who are where they belong or slightly below should not be able to 1v5 in a team game.
I don't believe any champion should be able to 1vs5. Kinda kills the game. even when said champion is super fed. In a 1vs5 you would think the 5 would have a advantage but like in movies it seems the mass always fights 1 at a time.
"1v5" doesn't mean going in and deletting everyone all around you. You can solo-carry games, it doesn't mean you can take the entire team by yourself. You can for instance secure objectives and split-push towers while being fed because people are scared to fight you and the only way is to come as 3, 4 or even 5v1, letting your team push the other side etc.
