Think maybe the problem is maybe a bit with you, I've played MMO's for about 20 years now, and while cheats are annoying, and I fully agree with your comments there, the rest has never being a real issue for me, yes I have had slight runs in with those types, but never in a way that it ruins my gaming time.
As to this game it would be great if they stuck to the grouping, and not go smaller than 5, those who would prefer not to be forced to be grouped, there a ton of other games for you.
MMOs though, they are clearly incredibly hard to hack due to most things being completely server side and completely online. There are a lot of multiplayer games on engines which support single player which people can exploit. You can say it's the developers fault, which in part it is but to rule out the hackers and cheaters and saying nothing is their fault is abit extreme. Blizzard, Trion, NCSOFT, Nexon etc. are not development gods, far from it if anything. Making a game like H1Z1 or something hack proof is 1,000x harder than an actual MMO.
That being said though I've yet to see anyone hack ARK, but you still get the sad tiny penis boys flying around on Argentavis grabbing and dropping anyone who isn't carring a firearm for 't3h lolz' cus they are so cool and edgy yo.