How do I go on after trying dungeons hundreds of times?

[Huntington]

Thornmarch and Titan HM are Trials, yes, we know. This is the Dungeon section of the forums, so this can go here regardless. I also can't edit the title so oh well.
I just want a Mog Weapon for my PLD from Thornmarch, but after another dozen tries of marking targets and giving directions and info for every single one of them, this is too tiring. I can't find a team that can carry me for once because I'm always having to do it myself. It sounds arrogant, but I'm too worn out to care by this point.

The same result keeps happening on Titan HM, I'm never going to get better gear because I never find anyone that can handle themselves. Stuck in an endless stagnation, and if I try to DPS for either fight, Titan HM finds results quickly usually, but it takes half an hour at the least for DPS on Thornmarch, and I need to be doing the damage apparently if all those runs for Thornmarch are evidence of anything.

I'd do a Party Finder, but after today my subscription expires so I don't have the time to sit here for hours to find people, even if they're confident players. I just want to get one or two planned things done before I break for awhile, and it just cannot let me win.

/rant