Imma just give it to you straight OP. The Alliance playerbase is and has been never shafted. They have gotten exactly what they wanted when they wanted and how they wanted with the pure exception of High Elves.
Majority of the Alliance playerbase wants to be the good guys: Alliance is never the bad faction, thus they never provoke a War. Even when they did in Legion through Genn Greymane breaking the cease fire, to make sure the Alliance felt like they were innocent regardless of how obvious genn was wrong. They made it all about sylvanas fault and genn was actually the good guy all along.
Canât have a faction be good and be the center of everything starting crap that involves people getting killed, or fights / wars to break out. So they have to react to everything. Meaning outside the worgen you need races that can control themselves and arenât centered around warfare.
Alliance likes races that arenât monsterous and are pretty / nice looking. Well corpses, cows, greenskin steroid creatures, mini green ugly looking creatures, and allied races that look like said ones arenât pretty and they seem monsterous in a way. Outside Vulpera and Blood Elves the majority of the alliance thinks the Horde is disgusting and only ever claimed to want vulpera and blood elves (high elves, same thing) from the Horde.
Racials: Every Man for himself dominated the pvp scene from WOTLK-WoD, Dwarf Racial completely shuts down Feral Druids and Assassination rogues making them unable to do anything for the duration of stone form. Shadowmeld is pretty strong in pve and pretty useful in pvp. Alliance Racials are pretty dominant when it comes to pvp in retail.
Horde Racials are better for PvE, the orcs racial for stuns is even nerfed in pvp. But this wonât make the Alliance happy apprently, they have to have it ALL. They gotta be better than the Horde in PvE and PvP. You can claim you want balance but in reality we all know you want the edge over your rival.
Representation: What representation outside of Orcs and Humans? Blood elves and Draenei are heavily neglected. Night elves and Forsaken get about the same amount of screen time. Tauren outside baine being a total cry baby have no representation. Like does anyone actually pay attention to whats going on in the story and in the game?
Alliance players when commenting what makes them play Alliance: I want to be the good guys, and the horde all live in mud huts, i want to live in an actual city like Stormwind. Plus Horde cities are harder to navigate through.
In USA: Horde outpops alliance, in the rest of the world Alliance outpops Horde. Europe is alliance dominant, China was Alliance dominant till Blizzard games got banned in China. Oceanic is Alliance dominated.
Everytime there is a War between the Horde and Alliance, lore wise Alliance is always the victors. Alliance has lost how many leaders compared to the Horde? And outside worgen tails which is such a niche and in my personal opinion a stupid / over dramatic thing what do you want that is equal to the Horde getting orcs with straight backs and forsaken getting bones to now show up on their bodies? Dreanei got eredar now, none of your races are hunched or ugly, so not sure where the tears are coming from.
Alliance loves to victimize itself. They love being the innocent faction that gets bullied so they can get sympathy points and feel like people care about them. It gives them good feelings and makes them addicted to it. You get what you want, saying anything otherwise is a delusion and a lie you force upon yourself.