Is there an unneeded hostility towards regular classes in this game?

[Ryuko]

I just got booted for no literal reason.

You were booted because you willingly gimped your dps by playing as Arcanist instead of Summoner. End of story. Perhaps you were given the boot ahead of the other people you mentioned because they can see your class instantly in the party list and thus you were easier to discern than a useless person just throwing things from far away. If I had to guess, people assumed you hadn't even unlocked summoner (otherwise why WOULD you be playing arcanist!?) and booted you because they assumed you knew next to nothing about the game, and would likely weigh the party down.

I'll say it in a nicer way than others, but I agree it is time for you to stop posting. You have your answers, and while I empathize that you want to think outside of the box (creatively), it just isn't viable... and I said this more than once. Now you are just fueling the fire and I think people are getting frustrated with the fact that you just aren't listening to reason or evidence.