This is my first post in the thread, but I have read through and kind of agree with "Elite" that most high-level programs are going to have at least one or two athletes that feel it is toxic. It doesn't mean it is toxic, mind you, but that they feel out of place or uncomfortable in the group.
I ran for a high-level program in the late 90s and remember feeling VERY out of place my freshman year of XC. I didn't have any close friends on the team yet, the training was much harder than anything I'd done in HS, and the older guys were still trying to figure out which younger guys were going to stick around for the long haul. It wasn't that anyone was mean, but that people were not overly friendly like they might be at a youth group or fraternity. It wasn't until late in the season that I really felt included on the team. By that time, I had run in the top 7 for a few meets (did not run conference that year) and was contributing to workouts. I had proven myself as a team member and worker. Guess what? 2 guys from my recruiting class left the team that year. Not for social reasons or because it was toxic, but because they realized they didn't want to run in college. One was injury prone and decided it was time to move on. The other just wanted to do other things like join a frat. No one was angry, but that is common with young runners and sometimes a few months of "getting to know" each other is needed at the higher level programs to figure out who is going to stick around, who is going to contribute, who is going to leave...
As I got older and took on a leadership roll, I was always working with younger guys who had problems or complaints with the program. 99% of the time it boiled down to not wanting to put in the work, or lingering injuries that were just totally aggravating for the kids. When injured, you can feel very isolated from your teammates. Even if everyone understands that you're injured, there is a sense of "okay, this person cannot help us this season and will not be in the van." D1 programs, especially P5/uber-competitive programs, are not social clubs. They are there to win championships and break records. There is NO ROOM for abuse of any kind - let me be clear - but sometimes people have their feelings hurt in competitive environments. More so for kids who are used to being the best. It can be especially hard for them.
If a member of a very competitive team is not performing to their own expectations, or is experiencing injury, many will put their frustrations on the coaching staff or the other runners. I saw it myself as a runner, and I even saw it on my daughter's HS soccer team this Spring.
Now throw in the increasingly ever-present element of "I must be a victim" and you very well could get a situation like what we have here. I have only read the RW articles and this thread, so I don't know everything in the report. If the majority of those complaining are lower-tier runners or perpetually injured, I would think twice before damning the coaching staff... and I don't even like Wetmore all that much after meeting him a few times (not that he'd care at all about me).