TBH this is not a new problem, we have had THE exact problem with servers in 8.3 in BFA,
old thread from BFA problem :
Continuous Issue of being stuck on Loading Screens - #169 by Jingoraitin
the good thing back then was that blizz had the dignity to own up to their mistake and worked toward fixing it with all the information players gave them, but these new lazy blizzard CS don’t even bother answering these threads anymore, shame on you blizzard, shame.