https://www.cnet.com/news/super-smash-bros-ultimate-5-nintendo-needs-to-fix/

That isn't to say SSBU is  bad, or even a bad Smash Bros. game. In fact, it might be the best entry in the series since fan-favorite melee -- but there are some very real shortcomings we need to talk about. The issues revolve around two major aspects of the game: the single-player Adventure Mode and anything that involves online multiplayer.

Let's be honest: nobody ever expected Super Smash Bros. to be a platform for good storytelling — but that doesn't mean nobody ever played a Smash game for the story. Despite being a game that's mostly about orchestrating increasingly ridiculous fights between iconic Nintendo characters, Super Smash Bros. Brawl on the Nintendo Wii boldly included an adventure mode. "The Subspace Emissary" featured six to eight hours of gameplay, sprawling platform levels with diverting paths and nearly an hour of cutscenes filled with action, comedy and drama.