I get it but it sucks. From the start, it's less about fault and more about the result. People in these situations are pretty fucked. Good chance of having extensive medical bills now and pretty much forever. That said, pretty unlikely it was the resorts fault in anyway.
Regardless of the jump, terrain parks are marked pretty damn clearly, most parks have a start fence/staging area above jumps these days because for safety and also the Salvini case etc. https://www.seattletimes.com/seattle-news/jury-gives-14-million-to-skier-paralyzed-at-snoqualmie/
Also another lawsuit in Canada is the reason for the S,M,L,XL markers on features. If those were up and they had a staging area of sorts, dude was absolutely in the wrong no matter ho shitty it is. Also, never ridden there but Grouse generally builds legit shit at least the last few years. Anythings possible but unlikely it was a terrible jump in 2016. They were in the top parks poll from that year and the next for Northwest.
One of the big issues with these suits is that juries don't know terrain parks. Lawyers use words like "eyeballed" and make it seem like incompetent people built the jump. A lot of jumps are eyeballed. It might sound shady but for people who have building those jumps for years, they know what a good jump looks like. Jumps are tested by staff and tweaks are made if needed before it's opened to the public, if it's really sketchy somehow it's closed until it can be reworked that night. Jumps re getting constantly maintained and small tweaks are always in order based on the reviews from the day staff guys hitting it. If a jump has been up for a while at a bigger park mountain, it's probably at least fairly legit.
Another issue is pulling in experts. They can get somebody that's an expert in something, to show what happened, and explain that the jump made that happen. Since he landed on his head and short, obviously it was the jumps fault.
They also list injuries on said jump in the time before and after. Maybe somebody else got hurt coming up short the week before. Wouldn't be surprising, big jumps and jerries = knuckles. The problem is that big parks have a ton of customers, even good riders get hurt, and jerrys def have some interesting sends. Unfortunately to a Jury, seeing that 4 people got hurt on a jump in the month before seems like damning evidence that the features was built wrong. Even on the most perfectly built feature, and the best conditions, you can fuck yourself up. Especially if you don't know what you're doing.
Entrances are fenced in, parks have all kinds of safety signs(usually smart style/park smart), you have waivers on lift tickets etc, but sometimes it doesn't matter. It sucks hard in America because theoretically you could win for anything. You could probably drive your car through a parking gate, passed security, up the mountain running skiers over, get to the park, do a fucking barrel roll off a jump, and sue because there was no sign saying "No cars allowed in terrain park" or even if there was, you couldn't see it.
Props to the lawyers fighting on the ski resort side. If it weren't for them, parks would be a nerfed pile of shit if they'd even exist at all. It's also hard to make your average noob feel for a corporation over some poor guy that got wrecked by an "obviously unsafe jump".
In someways the liability aspect has helped to drive standardization in a good way. The wild west days of mountains building totally rowdy shit any place any time is over(mostly). The bigger park programs at least generally follow industry standards. They might build slightly different jump styles, or set there rails a little different, but you could generally ride several of them without issue.
Idk, this shits always scary. The day you have to submit everything you build to some "expert" that's probably never skied, and get it approved before you can open it, I'll get the fuck out and find a new job.
Sucks for the guy, he's seriously fucked, and I can't really blame him for suing(most likely not even his idea), but it's not the resorts fault in most of these cases, and even the few times where they fucked up, the person generally fucked up way harder.