Diana isn't op
She has 2 clear weaknesses
.She has no escapes .If she misses her Q in a teamfights. she's useless.
You scrubs keep banning diana because you don't know how to play against her. You don't think that you should punish her that she misses her Q
You should also pick sivir to make her guarenteed useless plus moving left is very useful too to dodge her Q but oh well. euw is filled with shitty players
L2P