https://forums.elderscrollsonline.com/en/ZOS for some reason hates deathmatches. It was that way back when BGs came out and we had mixed queues and it currently is again. You get 1 deathmatch in like 20 matches of group queue. Solo queue seems to be better.
No idea why ZOS thinks 12 PvP players organize groups b/c they want to run from flag to flag while avoiding being pinned down by fighting.