Saying something is bad isn't criticism. MHW terrain is better than terrain in probably any other action game, since you can incorporate it into your weapon's moveset. Slopes allow you to slide down and modify your attacks (hammer has a slope slide attack as one of its strongest), you can lure monsters into natural traps that do huge damage and knock them down, you can climb some walls and jump off them. I can't think of any other comparable action game that lets you do stuff like that.
The lack of aesthetic variety on weapon/gear is a valid criticism but it's addressed in Iceborne, even if it's overall inferior still to MHGU or MH4U for example. But considering all the improvements to combat gameplay MHW brought, losing flashy cosmetics for better combat is a worthwhile trade off for a lot of people - especially when a lot of people coming into MHW never saw the crazy outfits in the other games.
The lack of aesthetic variety on weapon/gear is a valid criticism but it's addressed in Iceborne, even if it's overall inferior still to MHGU or MH4U for example. But considering all the improvements to combat gameplay MHW brought, losing flashy cosmetics for better combat is a worthwhile trade off for a lot of people - especially when a lot of people coming into MHW never saw the crazy outfits in the other games.