Agreed. I think we've had some rough red cards issues this season.
Saturday was the prime example, Jamie Murphy at Bolton was another, and that probably cost us two points. The Barton incidents (neither of which warranted even a yellow apparently) have been given their fair share of analysis...
Your original claim was 'we would have won' which is a statement, 'I'm sure we would have won but we will never know' is an opinion.
There's a world of difference between the two.
1: No proof we would have won. With Stephens in the team we had one attempt on target in 58 minutes. Did we have momentum when he went off? Yes, that's a million miles away from guaranteeing victory. Boro had £20million of players on the bench should we have gone ahead, they would have piled on...