How can the owner of the football club have 'no right' to criticise employees? He's the fella that went into his pocket to the tune of a few billion quid to purchase the club and just invested hundreds of millions to try and improve it. He has every right. If he fecks it up in the process that's also going to be on him, his investment, his reputation but that says nothing about his rights.
As for him not knowing enough about football to criticise, that's nonsense. It's a game of football not orbital mechanics. Boehly has not taken over NASA. Even if he knew feck all to begin with, I don't think it would be difficult to identify that the performance against Brighton was appalling. You don't even need to know about tactical intricacies to do that, it's a general observation that can be derived comparatively, i.e. Chelsea were absolutely rubbish compared to Brighton. I think somebody watching their first ever game could see that.