Fizz is a scapegoat

Fizz is being used as a scapegoat for players' dislike for assassin champions because he's annoying. Annoying doesn't mean overpowered, I've seen more fizz qq threads than I have in ages and most of them have something along the line of "fizz is annoying so he's OP" but he's really a balanced champion. I'll start with win rates 49.33% win rate and 13% pick rate across all regions, 13% is a LOT So he's played quite a bit that winrate is about 50%. It honestly amazes me how much hate assassins in general get they're always called OP but usually balancedish but annoying, it's how they're designed to be, fizz is no different. Fizz was pretty strong with grevious wounds but those are gone now. Here's a list of 11 meaningful ways to counter fizz, some of which work with other assassins.

1. Pick counters like morg or Kayle
2. etc
3. Play around his .75 seconds of untargetability on a 12 seconds cd
4. Dodge his ult
5. Poke him from distance
6. Focus him (once that E is gone he's screwed)
7. Peel (if you let your Caitlyn auto him unmolested from the back line he dies fast)
8. Ward, he's so dependent on roaming to snowball just neutralize that and it will help
9. Position correctly and hit him with cc when he's most vulnerable after he uses Q and E
10. Fight him when his ult is down
11. get your jungler to camp him (if so many people hate assassins then your jungler should be happy to help)

Basically play smart in general and you'll be fine, he's not OP, he just has mobility, just like all the other assassin champions. Assassins don't work without mobility. All assassins are mobile, it's part of their intended design. Though it cycles between Zed, Leblanc, and riven Fizz has been used as a punching bag more recently for whatever reason.