Superman is a neurotic weirdo who is just really good at pretending to be an extrovert, but can't let his walls down enough to trust the people he hangs out with every day in both identities with his secrets. He builds robot duplicates of himself and his friends for fun. He complains about being lonely but then dumps Kara into an orphanage when she shows up and takes forever to come clean to Lois. He says he stands for Truth and Justice, but hides behind a fake identity. He can be pretty hypocritical when it comes to the "no kill" rule too. All of these are pretty human flaws, it doesn't matter if he isn't literally human. Looking only at his powers is always a shallow reading of the character. Someone on an earlier page said that Bruce had some fetishes he's not eager to advertise, but I think that holds true for Clark too. He's the one who fucked a mermaid.
Bruce lost the battle of turning into an inhuman robot a long time ago, sadly. Clark has lost a lot of his own flaws. So the issue with the two of them these days is not that they are inhuman, they are both just way more boring than they should be. Ironically in an attempt to make them both more "relateable/flawed" and having the exact opposite result.
Thomas Wayne isn't a real person, so making him corrupt or evil just because real rich people suck is always obnoxious. The DC universe is a place where flying aliens that shoot laser beams from their eyes are everywhere and the Greek Gods are 100% real. It's not much of a stretch to think that one rich family is good in such a fantastical setting, especially as Gotham is still full to the brim of other rich folks who are absolutely awful.
He does do that. It's just really boring and not something people want to read about, so it's relegated to off panel.
I'm doubtful the Youtube video is offering much proof, because the real reason he can't fix Gotham with his money exists outside of the comics, not inside of it: status quo is God, and people pay money to read Batman adventures against super villains, not social issues. And the iconic nature of the character and his setting at this point means Gotham is popularly rendered as gross and corrupt with no end in sight.
It's out of the fictional character's hands, so it's always pointless to blame him for "why doesn't he use his money a different way?" DC literally will not allow him to.