Too far Gone? Did they outclass yukkuris in shitheadness? and no, the whole "not being easy" doesn't count, because yukkuris can be quite uneasy from the world's POV. And we aren't wiping them out of the face of earth. . .yet. . .
But yukkuri don't emerge from the wombs of our women. These things are hideous and incomprehensible. And while a species sufficiently advanced to take care of its permanently ill relatives without severely compromising its own survivability may have an obligation to do so, yukkuri do not.
Just because Yukkuris don't emerge from human females wombs, that doesn't make them any less candidate for erradication if they finally become 100% trash, scum and shithead, and keep on ruining the enviroment through their voracious appettite, at that point humanity may be forced to erradicate them since, well, there is no hope left for them, they would had basically reached the Xenomorph level of "unsavable" creature.
The thing is that this yurriku are quite competent and can take care of themselves also they aren't as hideous as they were expected to be.
Hell from the comments in general, seems that people like them more than yukkuris.
So i'll apply the same dissaproval, since they do the same to bodied yukkuris.