what else did you want him to do Shes going to go through a portal, he doesnt want her to do that, hes got a weapon... that seems like the logical move
i get his action, my problem is moreso that he apparently legitimately thinks he can beat her. when renslayer says "you're of no danger to me," it would be one thing if he responds "you leave me no choice" or something, but instead he's all "OH YOU THINK THAT HUH?" then when she beats him, he goes "OH GUESS YOU WERE RIGHT WHOOPS." just stupid.
also, i assume it was supposed to be comedic but it wasn't funny at all. reminds me of episode 1, where they constantly did the "loki thinks he's super powerful and knows everything and then he gets his ass kicked lol" thing. just give this joke a rest already.