Avira : i don’t see your problem with his statement on “Daas Torah”
1. Many Bona fide gedolim have an issue with the freezer system and consider it against hashkafas HaTorah. He is arguing about the freezer system and its negative effect on the dating system.
2. The concept of daas Torah is highly abused today. Just because someone has an issue with the way some people misuse it does not mean that such person is “blasting Rabbanim”
You can say that perhaps he could have used a more dignified language. However it looks to me like he speaks from the heart.
For all those who are knocking R’ Chananya bec. he is willing to speak up against societal norms, try arguing with his points, not ad hominem attacks on a person.