Maybe I'm the exception, but I was taught in my OW class not to do "trust me" dives, dive within conditions similar to your training and build experience. I was also taught that part of the planning process is doing site survey, asking other divers about the location, current, depth, conditions, etc. before putting your gear on and getting in the water. OW cert is a learners permit. You get out of it what you put into it.I've been on those dives with this dive op (and many other very similar dive ops) and the plan consists of "follow me".
I think the dive op was wrong to take inexperienced divers to a site that was 140'+ deep. But unless he put a gun to their head and forced them to jump in the water, they had the option of staying on the boat and asking the manager for a refund due to inappropriate site selection. There is more than one way to assign blame here.
The group becomes very spread out and at least on a wall dive, it's common to see new divers with poor awareness or buoyancy control going much deeper than they expected to.
Regardless of the plan, no reasonable dive leader would expect a diver with 2 dives to be able to handle much more of a plan than "don't forget to breathe". Many new divers are so stunned by what they're seeing that they don't even watch their tank pressure and certainly don't watch their depth.
No reasonable dive leader would take a diver with 2 dives to a site that has wall access in excess of 300' either, but that doesnt seem to hold true in this case.