I don't like leetcode either but you harm your point when you compare it to slavery. You are not compelled to work. If you don't like it, you are free to walk out of the interview room and go on with your life.

"You are not compelled to work."

I'm not the OP, and I agree with you, but actually, you kind of are compelled to work, if you want to eat.

It's more like sudoku for accountants.