I played Warcraft 3 competitively in the "goode olde" times. Ladder was full to bursting with maphackers. It was still the way most people played, even though it also fully supported custom lobbies/rooms, which were used plenty for DotA, but almost never for random 1v1 matches. It sucked.

You don't have a better way. You have a nostalgic memory of how games should be played which doesn't match what people in a modern audience expect. It's like saying the solution to cell phones tracking you is to use a landline, because that's how we used to do things.