-It was patched over previous versions. You can't play the non-reforged version anymore
-It removed features the previous version had. In particular networking
-It released with desync issues that would randomly drop players from the game. Wc3 doesn't support rejoin so this basically killed maps depending on how severely they were affected (and note, it even affected normal maps. But custom maps suffered tremendously from this)
Like just given those three points: Why don't you understand?
The fact you even say that custom games improved just makes me think you're being dishonest for some reason...because it wasn't some secret or even rare occurrence. 90% of custom maps were suffering it.
To be fair, judging by the fact it's either incest or people getting knives/cleavers put up against their throats, i'm going to go on a wild guess and say it doesn't paint it in a positive light. Maybe even suggests there's something wrong with them.
That's not a reddit thing though. People make one-offish comments everywhere. Maybe not in your inner circle specifically but in general i've seen a lot of forums and chat rooms growing up that are like that.
It's hard to compete with companies where the gacha game is literally the only thing they're trying to sell. Yoko Taro's still got the Nier Gacha game.