It's a map designed for rift specifically. It's not surprising it doesn't do well in control or clash modes. It's actually a really good rift map though.

Because ape can’t ape properly on this map. Love it.

I love Disjunction, Scouts are useful but usually I go with a rapid-fire pulse rifle or 120 hand cannon on that map, I try to go for the mid range, long range is a nightmare and so is up close.

People leaving the map doesn't necessarily mean it's bad. One of my personal favorite maps in a different game is heavily disliked by the community. The map Skyscraper in rainbow six siege. That games community had a very similar problem to this ones, where there were no new maps for multiple years. As a result, the community got very set in their ways. Skyscraper was considered one of the lesser maps, so now when people have the option they ban it. Unless, of course, any of the newer maps are in the rotation. In which case they generally prefer to ban those. It seems like it's an issue with the maps playing differently from the norm, and the players got so used to that norm over multiple years of not having any new maps that it's uncomfortable for them to learn something new. If you know anything about that game, nighthaven labs and emerald plains are so frequently banned in ranked that it's almost impossible to get a ranked match with them available. As a result, less people play these maps, meaning they continue to not learn how to play them, and as such continue to want to ban it because they don't feel comfortable playing on it. People have been leaving matches on disjunction literally since it first came out. I think most of these people played maybe one match on it, decided that the long ranges weren't fun because they had no interest in playing around it, and now refuse to play on the map altogether.

Multiplex also has to go, not even just because of the map but mainly because it's harder for my computer to run. Frame rates are always noticeably worse on that map. Every single map they've brought back has been undesirable except Meltdown.

Disjunction is a good map. What the problem really is, is it's designed for team play, and you have 6 random not communicating people who all take off in different directions with half the team running clear to the back of the other side and flip the spawns on the other half of the team who is trying to sit back with scouts or bows. Or, too many people go mid or hard scope the swamp, and the other team is clear to run all the way up the other side uncontested. At least that's how it's been on more than a few occasions I've played it.

All of the pulse and scout rifle casuals that equate distance to safety asked for large maps and then quit when they get it and see it loading up.