I hate when that happens. Once a friend and I were trying a 5 man raid with just the two of us and our pets. After about 6 tries at the second to the last boss we "accidentally" did what ever the trick was

to getting past him and then flubbed the last boss which is way easier...

to this day we still cant get past that second to the last boss... drives us INSANE

all the reviews say what I know, that Trion made all the bosses crazy hard. It just pisses me off that when I finally got the angle and go to the end it craps out on me