Halo Wars 2 was the only bad looking Halo, to the point of being unplayable (for me). It seems Infinite uses the same cartoony art style for some assets, such as vehicles etc (the banished ships look particularly awful) and maybe even for the effects. It’s clearly not nearly as bad as HW2, but certainly a very serious misstep.
And proper cutscenes like the mjolnir one (or think H2A) look way way better than ingame ones…