Overwatch

[Tempest]

literally the only character i have consistent problems against is genji, bastion is so easy to deal with people are just shit

Is Mei a good counter against Genji? I'm also thinking Junkrat, Genji can't deflect explosions back at him, or am I wrong?

Mei is basically THE counter to Genji. Mei and Winston, you just have to hope he sucks or he can still kill you before you can get him. Genji can deflect anything that is a projectile, including but not limited to: every ability Junkrat has except his ult, Roadhog's hook, Hanzo's ult (when it's still an arrow, not when it turns into the dragon), Mei's ult (before it hits the ground, when it is the little robot), Widowmaker's bullets (and they'll be headshots if she was going to get a headshot on him), everything Bastion does, and possibly Zarya's ult.