I have a strange liking of supervillains wearing bad 1970s suits. I think it’s a combination of two characters. The first was the Marvel supervillain Arcade, who was (note the past tense) a ridiculous filler villain who threw superheroes into ridiculous dangerous amusement parks.
(Sadly, he turned into a bloodthirsty long-haired figure who gained plot-induced superpowers of his own and presided over a ridiculously blatant Hunger Games/Battle Royale ripoff. That story is one of the few that I’ve removed from my personal continuity-I like the classic villain too much)
The other was Gene Hackman’s portrayal of Lex Luthor in the 1978 Superman movie. Hackman refused to go bald for the film (save for one scene), so he had to wear ridiculous “wigs” on top of his bad 70s suit. Both characters were made in 1978, and I doubt their styling was a coincidence.