So many pointless complaints and arguments about Mei and Naruto when, in fact, the real issue is literally your lack of strategy and counterplay to initiative. No matter what team someone runs initiative will always be there if they have better gear and, as such, they have a massive advantage regardless of their team. Now of course this wouldn't justify something * but even average, run of the mill teams have a much higher chance of winning a fight if they're faster. That just means you have more control over the flow of the fight by having first rights to combos, debuffs, crowd control and, ultimately, damage output. That's just the way things are.
Also, as a sidenote, the tobi nerf was something that was going to happen regardless. As someone pointed out very early, Oasis follows the same formulas that they get from our predecessors in other regions. We won't be getting unique buffs/nerfs because that's the way things are as well. Aside from that his nerf was actually very warranted. Having a farmable ninja that could easily become 5*, dodge nearly every mystery thrown his way then proceed to nuke a character by himself in just one turn and then revive to do it again isn't exactly balanced. He still adds utility and can do some decent damage but he's no longer used by every single player because of his raw presence.