main here, tank is kinda wonky now after all the nerfs. Still, Kha does have high base and scaling, and when split pushing, an isolated target would take 500 dmg or so from a q if Kha is full tank. Seeing as the q has a 3 second base, this probably happens at least every 2 seconds, plus theres his passive with IBG, which is a bit of a chunk
Still, the damage is not very high, and tank Kha isn't very good, less so after all of the tanky item nerfs. Even while isolated, tank Kha would take a decent amount of time killing an ADC. If he did well, he got fed early, its possible to do good on most possible builds