You're entitled to your opinion, but not everyone enjoys paladins or care for the class, myself included, so it makes absolute no sense to tell someone to just get over it because Zandalari got Paladins, as if it mattered at all.
Also who cares if many races have the Warlock class already? The matter here is Blizzard announcing the class and then refusing to acknowledge it. Of course people will be angry, of course people will fight back.
We spent an entire year seeing thread upon thread of people demanding Zandalari paladins but suddenly when we ask for Warlocks to be included we should just be grateful for Paladins? That's just not okay at all.