Isn't it all the same, "The Pot calling the Kettle Black", weak-minded people having the "need" to make ...?

Question

...others look weak?

Answer 1

no. that is a term to describe hypocrisy. if it was a weak minded person calling another person weak minded, then that would be the same.

Answer 2

Tearing down others or making them look weak, is a sign of insecurity and sometimes is call (to the effect of) "small, barking dog"

"The Pot calling the Kettle Black" is more hypocrisy, like a thief calling a robber a criminal.