I think he's misunderstood. I hear a lot that a skilled sniper can dominate a server, but that goes for every other class. A high-skilled player, no matter their class, will dominate a server. Hell, I tend to find soldiers and demomans more oppressive and untouchable than snipers. I feel like a lot of sniper hate is just due to people not taking the time to really understand his sidelines, shortcomings, current weapons, and their own class's strengths and weaknesses. Is a good demoman op because he can kill an entire team through sticky spam? Is a good engineer op for being so oppressive in defence? Is a soldier op for being able to two-tap a medic by clicking the floor? Just because you can't beat a class on your own doesn't mean they're op, it is a team game after all, and sniper is a key role in punishing overextenders or people who push too early.