Any dedicated main should have 60+ win rate, doesn't matter the rank; and since you haven't seen me before I'll explain something to you for my perspective, I don't care what the pros do or think of the game, anyone's performance is going to increase when you have top of the line computers with no lag. The pros just abuse what's the easiest way to win; like us some a few picks they prefer to play as, some are more flexible to play more than one role, some can play from behind, and some can't play against a couple specific champions.
If you think mastering a champion is heavenly then I'd suggest raising your standards, it sounds sad existentially speaking.
You know who else can deal massive true damage; vayne, fiora, darius, masteryi, irelia, chogath, velkoz, garen, syndra . . . sure not 1k in one hit, but ususaly they can with a rotation or two, or under some specific conditions.
Speaking of which, camille requires waiting to deal that kind of damage, and is still limited to melee range auto-attack, as well as having a short window to deal it; otherwise the buff to deal that kind of damage is lost, and her wind up sound effect accompanying this is rather apparent matching her visuals. If you're having trouble dealing with that then stun her right before it finishes charging, so it'll expire by the time she's able to act; or create some distance so she'll have to waste the time closing the gap, instead of nailing you. Referring back to those pros you idolize, again some don't want to bother putting up with her, just as some ban oddball picks like garen.