I don't think Titan HM is hard at all. It borders on the ridiculously easy side of XIV content tbh.
However, it is poor game design.
I'm not sure how many others feel this way, but I'm tired of feeling like Super Mario or Sonic; first hit you loose Mushroom size or your coins, second hit you're dead.

Too many of the primal fights require flawless execution. Yes, its simple to memorize the mechanics and for the most part they are very easy. But it's not like you can any of the extremes and have room for error.

If any of the individuals that make up the 8man party make a mistake, you're pretty much screwed.

The only way to beat the content is by repeating it over and over again with the SAME exact group. PT and Duty finder groups are pretty much worthless in these fights because most people will leave or give up once they've made a mistake, or if someone else in the party has made a mistake.

They're too unforgiving and less experienced players will be put off them without having the patience or static members to claw through each phase 1 step at a time.

Right now people just leave at the first sign of trouble and blame the other guy(s).

Poor game design. No strategy from SE's part.