Unless, you rode the wave of initial players and were part of the zerg that NM smashed constantly, Then welcome to the 20 family.
It's great you know me so well, and are so sure of my progress. I'm level 15 right now, and have most of the neat drops: Mithra pet, strider boots, emperor pin. I'm saving my 700+ lockboxes for after the drop change. But by all means keep trying to attack me personally instead of having a rational discussion about a game element.
The meta was NOT designed, it emerged. People figured it out. SE's intention was for parties to roam around, chaining enemies for xp and killing the NM's that those chains spawned. Long steady progression followed by small lumps of XP to break up the monotony (they stated it was a long grind). Credit due to the people who found the triggering mechanics and then found it was more expedient and less hand cramping to simply zerg the NM's one by one. 24 hours of it and done.
Eureka INTRODUCED toxicity back into the game. Training monsters over someone was a possibility, though rare in the overworld but beyond a minor inconvenience it wasn't widespread because it offered no real threat. NOW? XP loss, loss of contribution to an NM. These are realities and people have to be reported for this NEWLY REINTRODUCED problem. High levels will intentionally drag trash into the cowering healers on the side JUST to wipe them because "damn leeches" need to be shown. I've been in eureka for a decent amount and have seen all of this. This isn't the Utopia you describe.
There are problems and ignoring the bad because you like some of it is doing yourself and the fellow players you seem to think are so deserving disservice. If you truly want to help your fellow player think about how there are people who aren't doing this content because it's such a slow start and crazy threatening. Imagine what will happen to the level 1 who jumps into the content 2 months from now.
That's great, and I hope that continues. But wouldn't it be nice if you DIDN'T have to yell? If you could queue up and be put in a party and everyone could get xp and contribute at the same level? I know that'd be more fun for me and many others who have had different experiences than you. I won't deny that most of the NM trains I've eventually ended up in did not care, and the resurrections are freely flowing. But why do I have to stand there like a blob , or hit stuff and do double digits? Why does the elemental wheel even matter when I'm healing to add to contribution or res-ing to be valuable? What happens when people are all maxxed and the only NM they want is Pazuzu?
The pro-eureka people are seeing negative feedback as an affront and I'm not sure why. It's great you liked the content, but there are people who want to participate if only certain things weren't so needlessly frustrating.