The OP sounds like the sort of champ who'd queue AV/IoC BG weekends on their fully geared main on live back in the day and whine at all the players dusting off alt #23948 in questing greens trying to get those welfare epics asap. Said champ then spends the rest of the BG telling anyone that gives a shit how bad they are, while mindlessly turreting cooldowns into the nearest undergeared enemy player and berating the lack of heals as they overextend Rambo-style halfway across the map. Probably mained DK during S5 as well.
Jokes aside this apparent PvP scourge affects both factions equally and let's be honest, we're all playing this 11-year old emulation on a private server for the nostalgia fix and enjoyment of the game in its original form, warts and all. The vanilla PvP meta game is not balanced; very distinct classes and specs is part of the appeal. Some guys may prefer the challenge of playing a relatively underpowered spec and making it work against the odds. If you're craving super serious PvP this is the wrong era of the game for you.
It's also unrealistic to expect players who've invested a lot of their limited free time levelling and gearing a certain spec to change it on a whim (even if they do plan to ultimately PvP as your preferred spec) because you want more heals when you queue up. I don't know about you but I have a fraction of the free time I had back when I played retail vanilla - levelling and gearing a single spec for PvP and then doing it again and regularly respeccing is not cheap nor trivial in terms of time investment.
I've been casually levelling a few classes on and off over the past few months (highest is only in the mid 30s and others include a hybrid) but always spend a while at the end of each bracket queuing for BGs and also watch a bunch of Nost streams with 60 BGs and have noticed relatively few hybrids in endgame BGs or even in the lower brackets while levelling. Rather BGs seem to be chock a block with rogues, mages and warriors mostly.
Variety is the spice of life. The odd windfury warrior, Alamo groupie or dare I say it: retlol should be welcomed. They are not as bad as you make out either if played properly and will only get better as new content tiers are released with improved itemisation.
There's a few ways around this:
1. Don't queue.
2. Join/Create a premade.
3. Deal with it and try to have fun
Failing that, I hear retail WoW is looking for subscribers
Please, let's not incur the wrath of retlols everywhere!