RIP to the victims.
BTW, these types of accidents are extremely rare. You are more likely going to die on the way there or going home than on a ride if you're going by car. There's no reason to be afraid of rides in general. However, if a ride has a history of accidents, you should be a little worried.
I've been on similar rides to this. My favorite has a similar conveyor belt. However, the planks on this one are much, much more spaced out. The ones I've been on only have a gap for maybe a hand or arm. These look like entire bodies can fit in them

It also appears to be self-built, so it would effectively be the park's fault if it's a design flaw.