deleting squishies
See, the point in calling a champion a squishy champion is that, lo and behold, they're squishy and will die easily. One damage item doesn't look like that much but one damage item will hurt somebody with 0 defensive items. ADCs are in fact deleting each other, just as any damage class should be doing, and Divers are considered a damage orientated class. Stop pretending there's anything particularly broken with this absolutely normal interaction in the game.
Kled's strongish right now, but let's not delude ourselves. As a Diver(Skirmisher Hybrid), it's literally his job to be fighting down other champions, and almost especially squishies, and unlike most squishies, he must do this in melee range and thus REQUIRES that bonus defense to even function. You must think the issue through before you end up pointing fingers at the things Kled is supposed to be doing in the first place.