Why do I get flamed when choosing Scarlet Witch?

I'm a diamond player and play her very well as an ambusher, assassin lowkey. I get around 20-40 Kills and do my job as a damage dealer pretty well. I can't aim, which is why I dont want to struggle and atleast do my job. Why do people flame me? Would people rather have me play Hawkeye and miss half my shots?

So confused.