Batman being fascist really depends on whos writing him. In some comics he is a control freak fascist. In some he is barely keeping it together and is just as crazy as those in Arkham asylum. In others he is the shield against the madness of Arkham. In others he is fighting again authoritarian Superman. And in others still he is painting Robin and himself yellow and beating the shit out of Green lantern for some fucking reason.
I don't know what my point is beyond Batman can very a lot.
I think its one of the all star batman comics. I havent read it myself but its one of those comic pages that just kinda imbeds itself into your memory.
Part of the appeal I think is he's "relatable" because he doesn't have real super powers. In my opinion, he's less relatable because he has enough money to functionally have superpowers anyway. The normal people who end up with super powers almost certainly share more in common with us "normal" people.
The thing I take away from Batman is that if you think a problem though, you can prepare for what might happen and have a response ready, making you look like a super hero for those without the foresight. It’s a power anyone can have, so it’s very relatable and actually a valuable lesson.
Also, in many of the stories he is a terribly broken and traumatized man, and those sorts of characters are usually more interesting. Batman has just been around for so long he was brooding and sullen before brooding and sullen were cool which gives him additional cred. As the “flipside” to the Boy Scout Superman (at least at times) but the two have the same goals is where I really enjoy the character, I think the Justice League show did a very good job there in playing the two against each other.
One thing is, like others have said, he has had very different personalities depending on writing so you may really only like certain versions of him and that’s valid.
Any superhero can go full fascist if we think about it.
That's literally the theme of the injustice saga!
Superman, the sweetest and most kind of heroes, created a world government ruled only by those who he deemed worthy and started killing anyone "bad".
Any superhero, if mentally challenged enough (for context Superman just had his pregnant wife killed and his city destroyed), can do pretty much that. (That's also where Batman's contingency plans come in)