There are alot of bad tanks aswell. Same with bad healers. Bad tanks you seldom realize they are bad because they blame the DPS for "doing too much aggro" also they have the easiest job ever on Titan HM which is the fight most people see as "THE skillcheck".
Healers I have seen so many bad of at Titan HM aswell. Conclusion; Alot of the people stuck at Titan HM are bad. Good players passed him.