Title? I don't need no stinkin' title.
I'm not saying 3.x didn't have issues. Or any edition for that matter. Just that you're conflating having half a dozen modifiers with the move away from THAC0 (which by the way is pronounce THACK-OH and everybody else is just saying it wrong ). They're different topic.Well, 5e went to bounded accuracy in large part because of the huge numbers bloat of previous editions. A much needed design change. But given a choice between 2e's THAC0 and 3e's ascending system, 2e all the way. Even with doing subtraction, it was way easier and faster. You didn't sit there adding a half dozen modifiers that constantly changed depending on what was going on just to figure out what AC you hit.
Of course I didn't have a problem with 3.x either, although it did get a bit crazy when I had to have a grid with all possible modifiers and had to roll double handfuls of dice to resolve my full attacks. Then again that was partly my fault for having a dual-wielding fighter with multiple energy types on my weapons in a party that liked to buff the snot out of him. Good thing I quit playing 3.x before I got my dual-wielding beastmaster(?) to a higher level because I would have needed a bigger dice bag for the mount's attacks. Ah fun times rolling dozens of dice.