For a decently long while in TES there was a pan-human alliance which threw itself against every elfen force that opposed them so you can chalk up every elf force except for the Falmer and Lefthand Elves.
The Falmer were defeated in a war of attrition, being a low-density population inhabiting Skyrim they were basically unprepared for the mass-migration of fuckangry Atmorans, who mind had the favor of actual dragons on their side as well.
The Lefthand elves are weird, they are implied to be dimensional-hoppers in some sources so they may as well have just fucked off as they might've been genocided.
Orcs were said to have not have any kind of central leadership until the end of Daggerfall, so for the most part Orc tribes were little better than buff goblins.
Ayleids were destroyed by a coalition of Cryods (the pre-Imperials) and Nedes (the pre-Nords) working together, plus a good number of sympathetic Bosmer as well. The Ayleids were desperately outnumbered and without their slave-economy they could not produce magical constructs to help defend themselves because they relied on soul gems from their slaves to power them. Not to mention by the midpoint of the war a load of Ayleid lords turned traitor and supported the humans anyways.
>Bretons, being the weakest of all due to mixture with Elves, only massacres Orcs from time to time
This one is a bit less clear-cut because the Bretons were initially the slaves of the Altmer that lived in the region, but since they didn't enforce the blood-purity shit of the Summerset Isles and they eventually freed all of their slaves they freely intermingled and ended up producing an entirely new race with time. There is still a few island chains in and around High Rock which is more Altmer than Breton, but they are considered part of the Breton people anyways because of their shared ties.
The Dwemer didn't get eradicated as much as… fucked off? Were completely erased from history by a vengeful god? We're still not entirely sure. They made a giant brass artificial god in the process, whatever happened to them.Post too long. Click here to view the full text.