You're conflating two different things. Just because Horde players may dislike those characters doesn't make them antagonists. Blizzard does not even remotely present them that way and constantly brushes their wrongdoing under the carpet. Jaina's Purge of Dalaran? The Sunreavers that teamed up with Sylvanas
and tried to prevent traitors working with the Alliance to free another traitor were presented as the ones in the wrong
and condemned for still clinging to the Purge by their own goddamn leader. I can't even think when was the last time Rodgers was brought up in Horde questlines. Genn's Stormheim shenanigans were handwaved away and the most response it got from the Horde was a passing thought from Saurfang how that was something to be concerned about. Since Purge of Dalaran is ignored as a thing in lore Vereesa is also off the hook. Varian declared the WotLK-MoP Horde and yet in-story it's all blamed on big bad Garrosh
who wasn't even Warchief when it started. None of your examples even remotely prove @
Coconut wrong, with Thrall still beating himself over it.
But she was already working with the Jailer then and that retcon makes everything she did there very not logical. And Sylvanas already killed Liam to cement her status as the big bad. Anything else would simply deprive Alliance characters of important characters. Something Blizzard has no problems doing to the Horde where they throw disposable villain tags around the NPCs as if they were candy