Keto tortillas did not work for me

basically exactly what the title says. I tried adding tacos to my keto menu and it failed. I left ketosis and gained some water weight. has anyone else had success with keto tortillas? the whole zero net carbs seems like a scam to me after trying it. the shells have 12g of carbs, zero net carbs but I definitely felt the carbs after eating them. (2 servings) I don't understand why they didn't work for me because I've seen people on this page who swear they worked.