Like, I agree that Fisk was supremely underpowered in the episode, but they also made a point to show that he could take many hits and still walk away like it was nothing (hit by a car, electrocuted), so that's why I think he's fine at the end of the episode.
I also think we've become extremely spoiled as a fandom and expect everything to be of extremely high caliber. Of course we want everything to be that, but that's just not a reality and as a fandom, we're lucky the MCU has gone on for 13 years before it had it's first "Rotten" film in Eternals, and honestly Eternals isn't even all that bad, it's just that there's so many characters to introduce and the pacing is odd along with an underwhelming villain. I still think Captain Marvel and Thor 2 are worse, and enjoyed the movie quite a bit on my second viewing.
If you go in with the expectation that everything has to be Endgame or everything has to be some big event series or movie, then you're going to be let down. Shang-Chi was incredible and i'm definitely looking forward to seeing what's ahead for him and the Ten Rings just as I am with Kate Bishop and am extremely curious where they go with Maya/Echo.