AITA for saying my sister’s husband’s food is subpar since the honeymoon phase is over?

My dad got married to his wife when I was already an adult and so did my sister. But it was important to my mom that we would all bond and get to know each other. In the end, she did get her wish because everyone did click and like each other. In fact, my dad’s wife’s son is my best friend’s age and at one point my best friend lived with us without him.<br><br>The one tradition my mom started that everyone liked was Sunday dinner at her house. First of all, my mom loves cooking and whatever she makes comes out really good. But everyone liked coming over and spending time together or helping mom finish whatever wasn’t eaten.<br><br>My mom decided to continue Sunday dinner after she passed away and besides the occasional cancelation, she’s been able to keep it going like before. Sundays are usually a big potluck with everyone throwing in something to the mix. This also helps since my mom’s health started declining so she can’t do all of the cooking without getting tired. We’ve always been a family that’s big on food so it’s never been lacking at her house.<br><br>My sister got married last year and her husband used to like coming to Sunday dinner and he was usually super enthusiastic about the food. But after they got married, he started complaining about the food and how it was poorly made and lacking effort. We’d tell him a lot of the dishes were passed down and some of the foods he complained about were his own mother’s recipes.<br><br>After a while, he just stopped coming to Sunday dinner and instead, he’d cook his own food.<br><br>Now, my sister is pregnant and she’s had a tough time adjusting to the symptoms so she’s been asking a lot for mom’s cooking. Mom is a little stressed and so are we in trying to accommodate her. My sister’s husband started complaining again about how we’re ruining her by giving her subpar food.<br><br>I snapped and told him that I get he doesn’t like mom’s cooking anymore but to stop neglecting the fact that Sunday dinner was a bonding experience for everyone. Also, to berate his MIL about her food when she’s just trying to help his wife through a hard time was just assholish and that he’s the one ruining her by expecting her to eat his food constantly when she’s not in the best mood.<br><br>He told me it wasn’t any of my business on how he treated his wife and MIL but I told him that it was since he was trashing our mom’s cooking when he was the one who was an ass for constantly criticizing it when we were just trying to help him and his wife.<br><br>He hasn’t talked to me since and my sister told me that I should’ve just ignored him. But mom told me that if I was an asshole for telling him off then she was an asshole too and thanked me for defending her.<br><br>So AITA?<br><br>Edit: I initially didn’t think about his cooking but thinking about it now, I remember him sending pictures of his dishes and him inviting people over to try his food. His batches were way too big for him and my sister to finish so he was trying to get people to eat over at his house. Also a lot of the times he did join Sunday dinner or when he visited his MIL for a meal, he’d criticize them for making big portions since it was “wasteful and poorly planned.”