So I queued for RDF HC today and joined a dungeon in progress with 2/4 bosses killed. I got a message asking me whether I want to get saved or leave instance. I clicked leave and kindly asked my teammates to kick me because I need to run the full instance. They started acting extremely toxic and told me to take deserter and that they will report me for disrupting gameplay if I don't do so. After having a brief conversation with them regarding their attitude, 2 of them told me they had me reported and that I will get banned. They obviously refused to kick me just to have a reason to report me and get me banned (I'm a DPS so they would instantly replace me without any problem). After 3-4 mins I just left and took deserter (the group wasn't even full, we were only 4/5).
Is this how RDF should work? Why would I be forced to leave and take 30 mins deserter because I don't want to get saved on a heroic dungeon?