Here are my issues with this mission
1) The difficulty of this mission is binary. It's either impossible if you don't have gear granting you immunity to the poison/fire pools or it's incredibly easy if you do have immunity. There's nothing skill based about this mission, which is what I understood danger missions were supposed to be, it's entirely a gear check.
2) There's way way too much oil, it's impossible to avoid it leading to issue 1, and it becomes impossible to actually see anything in the level once fires are lit.
3) Without the poison/oil pools the oilgels are incredibly weak, their attacks only do a couple pips of damage.
4) This mission just seems like a scheme to make players invest in an otherwise terrible set of armor.
1. This is a danger mission. It may require a different set of gear. The developers didn't sit down when they made this game and go "Okay. So we need to make every content doable with Vog Cub and swords."
2. They recently updated this mission by nerfing a few things. It was ridiculously difficult before, but now (and at the time of your post) it is reasonable. From updated feedback, people are only dying 3 times now throughout the whole mission assuming you are doing things right and have the right gear, and that is without abusing the immunity to oil tactic.
>>A. Have you learned the content? Are you doing your best to keep the Oilgels from getting lit by focus firing Gremlin Scorchers? Are you then taking out Polyps and Oilgels that are lit? Are you kiting and making sure to kite Oilgels away from any fire source?
3. There is definately things skill based about this mission. Are you avoiding literally every avoidable attack that there is? Not that you have to, but if you are not, than you have no excuse to say it isn't skill based. If you are getting hit by avoidable attacks, try learning them and avoiding them. This will take more than one run through.
4. It is very difficult to see things when oil is lit. The way we solve this issue is by taking out and getting rid of everything we can which might light the Oilgels or oil. We do this by killing Gremlin Scorchers the very second they spawn.
The mission is by no means binary, the devs have balanced it.
I call myself a normal player, and I managed to solo the mission with 3 revives and so have other people, 2 of my revives because I got hit by avoidable attacks. However, most likely unlike you, I ran through it a good 5 times in order to learn the content instead of getting upset once I couldn't /win the very first time I walked in there then complained on the forums. And as I said earlier, we aren't even abusing the immunity to oil issue.