This is the weakest season so far. Besides the increased silliness level that doesn’t mesh with the show’s established style, the plotting has been uncharacteristically sloppy and they are ignoring all the established time travel rules of the universe.
I can't agree. Besides being delightful, the silliness level really isn't that much higher than some previous episodes. Also, it does fit in with the time travel ruled of the MCU as seen in Endgame (the "be careful or you'll branch off other timelines" rule, specifically).