Is mercy nerf fair?

I don't main mercy that much but mercy is a bit annoying when she fly away and goes byeeeeeeeeeeeeeeee bitch like bruh i got shit aim but like uh i gave up on it and started playing her for a while and now i can't get bitch when i play mercy xD she is dummy fun to play i don't see why players think she is boring i just ult and fuck all them up.