Why were you kicked?

I think there needs to be some type of message or window that pops up that shows why you were kicked from a group, so you can go report kick feature abuse for those players that like to kick so as to increase their chances of getting the loot for their friends, or any other reason why people kick for no good reason.

I think its a huge waste of time to get to the very last boss of a dungeon then get booted and have to start again another 30min run because some folks felt like doing the above mentioned.

Some suggestions would be to show who the player was that initiated the vote and the names of the other players who agreed so you have something to use on your report.

They should have record of who initiated and agreed. So simply submitting the report should suffice.

That's really horrible to kick someone simply for better loot chances or something silly like that, exp in regular dungeons.

Just let it go. Getting kicked if you did nothing to deserve it sucks. However dwelling on it and letting it bother you, just means other people have too much control over your emotions. If you feel it was unjust and out of the blue report it and then let it go. Reasons why it happened ultimately won't make any difference, just be happy you are no longer in a group with such people.