People who are saying there's no issue here and that fresh tanks should "git gud" may not have started lvling up a tank from scratch after the changes made to tanks some patches ago.

They lowered the tanks' attack power (and they also made VIT contribute to their damage and at the same rate as STR, but that's irrelevant to this discussion). This would also lower tank enmity and instead of adjusting the enmity multipliers on the skills they decided to increase the enmity on tank stances (shield oath, defiance and grit). So because of this change tanking at lower lvls before you get your tank stance is harder now than it used to be back in the day, even if you're properly geared. PLDs get the worst of it. They already had a tougher job pre-nerf, now it's hell.

While tank vets may adjust to the current situation it's super harsh for new players as it is, and it's super discouraging to keep losing aggro every now and then. I've made a few alts after the change and I can testify that it's a lot harder than it used to be.