Enas:
Im really curious about what do you all think is the worst toxic behaviors people have?
Picking one ranked above others is difficult (at least for me).
Sociopathology might top the list. Currently dealing with that with a close biological relation of one i love.
Dishonesty/lack of integrity/untrustworthiness is near or tied at the top of my list.
Physical violence is also up there, likely now a 3-way tie.
Sadly with all the ways humans can be toxic, your question is likely to generate a long list.