I don't know the room, I don't know the players, I don't know the floor. But I've learned how to listen and read skeptically.

Just based on that I don't believe that things went down as you said. That doesn't mean I believe the players were colluding, just that I don't believe that the entire basis of the decision not to allow these two to play together was that some player stated "Why do you think they're colluding?" "Because Player A is winning too much money, and Player A and C are friends."

People hear all kinds of things in a cardroom and seldom do they hear the full story.

I don't know what the full story in your situation is, but I really doubt that what you have written is the full story.