As much as we all wish that the MMO world was completely fair and that only clothies could roll on cloth and so on and so forth that just isn't the case. I really do understand where you are coming from but in the end we all just have to realize this is just a game, yeah there are always gonna be the elitist a**holes who think they are entitled to everything. We all have two choices 1) Cry about it and let it ruin our gaming experience or 2) Just roll with it, sure you can get pissed off but in the end just get up and try again.
Uh...this is extremely normal.
Setting loot to free rolls BEFORE the final boss is pretty standard for groups for enchanting. It seems they even called it and told the party before then and you just missed it. If you didn't miss it, then you should've voiced your concerns right away.
If you left the party straight away without even clearing up if this was set beforehand, and whether they'd switch it back before final boss (where drops actually matter), then you are in the wrong and overreacted.
You use a controller.....
This is normal, most people only run FoK and BT these days for enchanting fodder. You should have said beforehand if you needed enigmatics.