Why are bruisers a problem, but mages are not
Like I really don't understand. Everyone is yelling that bruisers deal true damage. Nobody complains about the fact that mages are building so much magic penetration that they deal damage close to true damage or even true damage because and they spam those abilities like there is no tomorrow because of how much cdr and mana they get from items. On top of that now they have so many defensive items that synergies so well with their kits.

Bruisers don't build that much HP over mages and people act like this is a big difference. Bruisers are also melee champions, but hey. Who cares about that.
Mages are also in 3 roles, they are the strongest atm in 3 roles, but bruisers are the problem. Zyra and Brand who are supports btw can pretty much one shot everyone and they are supports btw. Bruisers are the biggest problem.
has been a god tier pick on 3v3 for years, despite being a map known for being bruiser-dominated. I would argue mages are stronger than bruisers as a whole, since they have a larger viable champion pool. They also have exponentially better itemization compared to bruisers.