I fully agree, a win on saturday would have shown a lot of fans Martinez has the nous to beat a form team with one less player.
Instead his tactical changes and lack of reaction to what was happening AGAIN is what cost us the game. He had fair warning with Carroll coming on, he did nothing to counter that, which shows the difference between a good manager in bilic who could change tactics, and one that should be on borrowed time who thought keep doing the same would be good enough.
Tbf mate, it wasn't a lack of reaction. He reacted fine to that Carroll sub at half time. What could he have done to counter that other than what he did with the players we had available?
What messed the game up was when he decided to make a change when there was no need for it. So if anything it was actually his reaction that conspired to our defeat...