The striker's dismissal helped Real defeat Spurs 4-0.
Bale, who was one of a few Spurs players to come out of last night's match with his head held high, said he felt the red card for Crouch was "a bit harsh".
He said: "In the second challenge he didn't touch him really. These things happen. Playing Real Madrid is a massive task for any team but to do it with 10 men was hard for us. With 11 men on the pitch it would've been an easier game but it wasn't to be."