Anyone who thinks otherwise is a massive retarded faggot.
>inb4 muh ice
Ice is a great offensive type, so is rock.
>inb4 muh poison
Poison is an EXCELLENT defensive typing, so is dragon (which by the way is the superior type to use to resist water and electric types)
>inb4 muh bug
Bug does not have five fucking common weaknesses. It also has a fighting resist and has the best move in the game, u-turn.
>inb4 muh powder immunity
Powder moves are complete dogshit. Even spore is bad because every user is slow as sin and electric terrain was heavily buffed in recent generations, nerfing sleep.
>inb4 muh useful resistances
Flying and bug types are better ground resisters (especially since flying is outright IMMUNE to ground) And dragon is much MUCH better at resisting electric and water. And fucking no one uses grass moves because offensively it's so bad, even worse than bug. At least bug has amazing moves like U-turn.
>inb4 Ferrothorn and Kartana
Paired with the best typing in the game as well as having minmaxed stats.
>inb4 Venusaur, Skymin, Tangrowth, and Serperior
They are very bad without their gimmicky or just plain broken abilities.
>inb4 muh waifus
Fairy types have objectively better waifus. Even if grass has better waifus, what's the point if the type is so bad you can't use them.

There's just simply nothing grass has to offer. The game is better off without that faggot type. No wonder GF has never shilled a grass type ever in the series.