Honestly, while people's behaviour online really sucks, this is quite mild and you really should develop a thicker skin for online play nowadays. Common decency would make you assume people will say TY and Good job and all after a successful run, but I've come to accept that as long as a group doesn't outright berate people and starting cursing at everyone, its a pretty decent group. Getting upset that they didn't say TY for the group is a little silly, imo.

Its definitely rude that they kicked you without saying anything, but oh well. Such is life with anonymous humans online nowadays. At least they let you finish the run.