Adventures sucked, and not just because it was different. It sucked in so many ways it's hard to even put it in few words.

The game was kinda like Zelda, except the part where it's fun. The voice acting was kinda like the other Star Fox games, except the part where it's good. But in all honesty, the worst part about Adventures is how much it destroyed the Star Fox franchise by adding a LOT of unfitting lore and characters that make no sense in the Star Fox universe whatsoever and are now forever part of it because Nintendo just had to turn Dinosaur Planet into a Star Fox game. (...) and I'm damn sure the game itself would be a lot better as well if it had not had the Star Fox name on the cover.

Assault... it also sucked. The game had an interesting story, a good OST, and a lot of really great ideas overall, but the execution is atrocious. The controls are awful. The level design as a whole is terrible. The art design is horrible. There's not many redeeming qualities about the game, as even the Arwing-only stages were kinda slow and boring compared to the ones in Star Fox 64. It's a shame, because the game could have been great. Maybe if it had another year of development time, who knows.

Command I haven't played, so I shouldn't be able to judge it. However, I do know some stuff about its story and I have watched the prologue, and that is enough to say the game sucks too. Everything about the story feels like amateur fanfiction dreams, and I don't just mean the ideas - the writing itself is horrible. The text on the prologue honestly feels like it was written by a 14-year old rather than some supposed professional. It doesn't help that they were looking at fan forums for ideas for the game.

That doesn't really leave much room for choice. Star Fox Zero has some problems, the most major one being a severe lack of meaningful content and replayability (especially when compared to 64), but is still easily the second best Star Fox game ever. And I guess that's saying a lot about how lackluster this franchise has mostly been.

Edit: inb4 curl says SNES Star Fox is the best Star Fox game

Star Fox Adventures sucked as a Star Fox game as much as it sucked as a game altogether.

Haven't played Adventures yet. Personally, I have a tough time choosing Assault or Zero. Assault had some control issues, especially with on-foot battles in terms of aiming and some of the enemies were a bit cheap. The story was ok but the voice acting audio was kinda odd. Still, the gameplay was still decent overall and multiplayer wasn't bad. Solid but I can understand why some people don't like this game. Zero was a nice reimaging and I actually didn't mind the controls. However, the content is on the lighter side, which is unfortunate.

I didn't mind Command, but the variety of endings and such were a bit off-putting, like pulled from fan fiction or something.