I totally get where you're coming from. I also have a player that frequents my LGS who also has the Paternalistic instinct to always tell me i'm doing something wrong (often coincides when I do something to put him behind... coincidence?). After a couple of matches of this happening and him being super salty about my plays, I talked to the player afterwards just simply saying: hey man, I play the game my way, and if you want to critique me the entire game that's fine, but no one will want to play with you if you're like that.
He seemed a bit flustered afterwards and definitely embarrassed to be called out on it so plainly. I haven't seen that player return back, but if he were to change his attitude, I would definitely not hold anything against him. I feel like some players just get too controlling in a game and sometimes it's best just to call them out to bring them back down to earth. I never would promote being mean or bullying a player doing this, but having an open discussion on things that negatively impact your play experience is the adult thing to do!
Also a good go-to I use when people are razzing me to take sides is just to plainly say "you do you, I do me". If they want to make a deal, it's different, but if it's a consistent razzing just ask them to stop playing the game like they've perma cast Worst Fears, that should shut them up.