Why are people such assholes?

I finally decided to level a hunter after playing since vanilla and never touching them because I didn't want to be a "huntard". I'm a dwarf on Sargeras (pvp server). Since the summer event started there are lvl 100's everywhere spawn camping lowbies and clearing out towns and camps with quests in them. Far more than I've seen before on the other 3 toons I have leveled on Sargeras.

I've gotten to level 80 now and decided to look into getting a rare pet. After some research, I decided to try to get the ghost bear spirit beast from Grizzly Hills. Got to his spawn, started realm hoping. Got super lucky, after only a couple hours of hopping, I found him. No other hunters around, not on a pvp server. After a moment of panicked excitement and forgetting where I put my tame button, I started my tame. Less than a second from finishing my cast, a lvl 100 drops in on me and one shots the bear. Doesn't loot it, just mounts up and immediately flies away. Wasn't even another hunter, just a melee class who wanted to shit on another person's good time.

I get that sometimes I'm going to run into a high level horde player, being on a pvp server, but right now it's everywhere with the summer event. It only takes one or 2 to lock down an entire town. There's no reward for it other than ruining someone else's time. It's not like they're going to draw out a worthy opponent to Hellfire Peninsula in the 45 minutes they sat there farming Honor Hold.

I understand there's not a whole lot to do right now, but why do so many people have to be assholes and ruin the play experience of others? I want to tame a rare pet without it getting one shot, I want to quest without being camped by a level 100 every couple hours, and I want to fight other players my level every once in a while out in the world. Is that to much to ask for right now? Sorry for the rant, I'm just really salty about that pet.