Well yes.... Batman and Spider-Man have grown the largest rogues gallery over the years but not just that, they also have imo the most complex villains. Thats not saying others lack complex villains, but theres so many like this in batman and spidey. Some people don't like it, but I like that they have so many villains with tragic backstories even if it doesn't excuse their current actions. Plus it only adds to the idea that some of thrm can be redeemed. And we have seen this several times.
Croc has a soft spot for orphans and even reformed in SS. Two Face still has Dent in him who can come out and do the right thing. Bane may be terrible, but the prisons made him like that. And in the end he ended the dictator who had destroyed Santa Prisca completely. I dont think Man Bat needs explaining. Then theres Scarecrow and Penguin who were abused by their fathers as they grew up. William Cobb who was treated like dirt for being poor during the industrial revolution. And so on.
On top of that, all the various levels of twisted characters offer a wide array of foes for Batman from world endangering eco terrorists and ninjas (who doesnt love ninjas) to mobsters that offer a slightly less endangering but also a street level read. Besides, cliche rampaging monsters amd alein invaders eithout any real motives personally aren't very interesting. Characters like Lex, Silver Banshee and Parasite have always been far more interesting, but theres not as many.
