I think you miss the point people are making. It's not that it's to hard. It's they advertised everyone could get a turtle mount. Which is not the case, it will only be the most skilled that get it. So they either need to address this by making it easier for the unskilled or have the egg drop a different way. But it's false advertising.
I'm ok with it this way & enjoy a challenge, but this is more for people who are geared. Most open worlder's are not geared for this & it will be tough to get a full map of experienced geared people at the same time as well, people will get screwed even if your good by not a full map of good people, so your point is not valid. Fractals or raids are smaller & designed for that, not this. Very few will complete this & the maps are already empty, everyone is giving up, so it's going to turn into an empty map & what about people who bought this for the massively advertised turtles? .
Open world has always been casual, this was the vision since beta, which is why they created harder content for those of us that want it, but locking a mount behind this is wrong. If they wanted it this hard, they should have put it behind a raid or fractal. Which would have cause outcry as well. But ya people have a right to be upset because of advertisement. Like to see you go buy something & have that store tell you you're getting less than advertised, you would complain too.