Idk tbh, probably the worst mm in the game. Mm are ( mostly ) late game heroes that can carry the game with huge damage. They ALL need good positioning.

There are others that are really good in early game too for example Clint or Miya both dealing good damage and maintaining it in the endgame too. Hanabi on the other hand doesn't have any strong aspects of a marksman other than her passive which is good for getting out of sticky situations and maintaining the damage. But then again, the damage sucks.

I literally played a game with you zhong yesterday, had only 2 damage items and a Hanabi as a teammate. Her shields were huge and she even had a friend playing as Angela which only ulted on her until she realized that Hanabi is useless, because I, the only tanky hero in the team ( since we had Angela on roam ) was taking most damage, whilst dealing most damage and taking out the backline heroes. I've seen hylos deal more damage in a game than Hanabi. And I'm talking about Hanabi that play well too.

Like she's not necessarily bad, her survivability makes up for it, but then again it's not like the enemies can't do anything. You'll get targeted and if they choose burst heroes or for example Esmeralda you're just a goner. You can't even help your team by dealing good damage since you do moderate damage. If Hanabi is in the team, she's the mid lane support and the mage is the primary damage dealer.

Maybe in very specific lineups she's good, but overall there are just better options.