Dunno, I spent (wasted) 3 years of my life studying theoretical computer science at PhD level including very advanced parts of (discrete) math and many of those

Dunno, I spent (wasted) 3 years of my life studying theoretical computer science at PhD level including very advanced parts of (discrete) math and many of those parts are just unnecessarily obfuscated to enable academic careers and an academic version of "demonstrating one's worthiness". There are not many cases of a worse feeling than when you realize after a year and half of difficult studies that the problem was either simple and obfuscated, or that the set of instances satisfying some theory is empty.