MEPAL: you r %100 right and HIE shame on you.
I will not state wether I hold from the eruv or not but all I know is that I follow my rav.
We each have to listen to our own rav and it really doesn’t matter to hashem which one of us follows the BIGGEST godol hador.
My rav is the biggest godol in my eyes and rav belsky is biggest in ur eyes. He is a godol but if others don’t follow him, they don’t have to go by his rulings.