Physics objects falling trough meshes using complex collision as simple

So, what you are saying is that you have never worked in a professional environemnet one day of your life, but you feel justified posting inaccurate ■■■■■■■■ online for the sake of just posting something.
Got it.

How about you try and generate collision hulls First, then maybe, after that, give your learned opinion?

And btw, you and every newbie can actually do this In Engine - assuming your mesh is not trash, which given your “opinion” seems evident it is.