The comments about culture really struck home. In many cases it isn't a particular person who's to blame for teammates not feeling comfortable, it's a general attitude among everyone that doesn't foster respect and trust. For example, teasing is allowed to go really deep and personal, and that the receiver has to just take it and stew about it. It takes leadership to shut that down when it starts to happen. I am not saying Eichel was the person who made everyone uncomfortable, because I don't know that, but it does look like Eichel was the person who failed to stop it.
The Bills were mired in bad culture for years. Well, decades. Then finally some older, really good players stepped up (Kyle Williams, Lorax come to mind, and probably some decent players like Tyrod Taylor too), the bad apples got tossed from the barrel, and the field was ready for a new crop of happy relationships.