I don't get 6v6 with 2 tanks

What do you think it means?

One shots are in every game and are way more unfair - #119 by GreyFalcon-11737

https://www.reddit.com/r/Competitiveoverwatch/comments/17wd6f5/rant_devs_could_fix_the_main_qualitative_hero/

https://reddit.com/r/Competitiveoverwatch/comments/1djplfa/the_devs_can_fix_tanks_issues_including/

https://i.imgur.com/9CjDLQq.png