The game ia good but is so Unbalanced like is give me Headache in real life

The game is fun but it have a balance issue , some hero are too op Example : The purple sniper guy whatever his name is ,he so op, he and his teammates can see through his smoke, he can one hit atmost all hero (wtf) and his ult , when he use his beam you dead , one more is the hero upgrade feature this make the game more unbalance for pp who new to this game , i always been matched with enemy who have much higher Hero level than me and my teammates .there r more but this is enough to tell the game still have many thing need to improved

Game is very good but