Same issue so confused

Im lost and cant figure out what wtf the problem is i thought it was nute burn so i flushed nothing got better so then i thought it was potassium toxic because i used bloom to early not the case so im stumped done a ton of research and nothing iv tried worked

Driving me nutsss please master growers help meeeee

ı am not master grower. but its done can not reverse look at your new growth. yes it is nut burn.

So should i cut thoes dead leafs off

its not dead, ı personaly not cut any leafs if it not necessary. leafs sugar inside ı leave it until its totaly die. you can cut it its not big deal

Are you overwatering it? It kinda looks like dampening off. The base of the stem is really skinny and looks like it wants to fall over.

Got it tied to the side little lst