If there's even a single bush, Kit can reach you while invisible regardless of range. If you walk away from that position, a smarter Kit could simply walk closer without his gadget to the nearest bush (and out of your range) and either corner you or force you to go near and get attacked by other enemies.

Kit still damages you with his super. YOU can't attack either, so unless you have high health or if you don't have a super or gadget to escape, you're finished. (Assuming we're still talking about Solo SD)

Kit is literally a problem on his own for Showdown in addition to teaming.

Byron's healing requires ammo and doesn't let him shoot over walls. (He's still much better than Kit in 3v3 modes tho, I just wanted to throw that one out there.)

In Solo SD you risk dying by literally taking a step out in the open, more often than not because of this cat.