Why would such person join if he can solo?
Here you should say “who can handle one line solo”. So you don’t look like waiting for someone to clear the mission for you. It’s always fine to have someone per line, one who clears the leftovers, and one support who buffs and opens the chests.
There will always be idiots playing MMOs. The worst with these cretins is that they always try to justify their stupidity. Simply go over it, don’t fuel their moronic behavior with drama. Next time, try to organize your party with players you can trust. That’s why I don’t do random uphill anymore, but party with my guild mates or trusted players.
My last experience with a random party was so frustrating I decided to never do that again: was bringing my main warlock just to see three undergeared players taking the line spots and saying “go away we can handle the line”… and the fourth staying afk and leeching. Only had to sulk and open the chests for half the time, until all three lines got overwhelmed by mobs and I had to clear the whole mess in the middle without any help… And at the end… no “thanks” or “thank you for party”, all just left the map and the party.
Unfortunately, I never see anyone like that getting banned. It already took months for the staff to get rid of an obvious dungeon afker…
Well usually when I bring my warlock for solo uphill, I simply stay in the middle and spam AoE and watch mobs getting popcorned by my spirits…

