I find it kinda funny how you get annoyed by "players complain about "cancer" teams such as 1 tank + 3 healers or what ever", yet in next sentence "broken line up of Shisui, Iruka and Masked Man/Minato. Why bother fighting when they literally dodge every single attack you throw?!" Same thing, no offence :D

There's no team without weakness. Every lineup has it's strong and worse matchups. Full buffed team? Han decreases whole team's damage by removing buffs. Dodge team? Multiple aoe dmg. Healer teams? aoe attacks/attacks that hit priority target + r1/r2 targetted damage. Optionally heavy control.

Obviously, people rant about healing teams, because they arent all that interactive and prey on enemy making mistakes rather than outplaying by themself.