AITA. FIL told me a suck at being a father.

Just like the title. I put our 8 month old daughter into her walker backwards this morning because there was a blanket on it and I could tell. It lasted 4 seconds before I figured it out and went to swap her. While doing this, my FIL gruffly tells me: "wow, you sure do suck at this fatherhood thing." For context he's not in good health and rides a recliner literally all day. It pissed me off, I said nothing but don't want to be a part of while everyone else is chilling in the living room. Am I the asshole for being scarce?