Short answer: yes.
Long answer: I would dislike the game itself as, even as a spinoff, I liked what was done with Reach. Don’t get me wrong, Reach had its fair share of problems, and I think we all know them by now, but I can’t say I ever completely disliked Reach. With that said, as a Halo game, sequel or not, I don’t like Halo 5 Guardians. It isn’t because it is a sequel to the Halo story we came to know and love with the trilogy, but that, as a Halo game, it does nothing to appeal to me at all.
Campaign story is awful, and no amount of separating it from the main story of games can change that. The level design is better, but the AI is incredibly stupid. It doesn’t help that you have to lug around a bunch of braindead squadmates that make Kat’s driving in Reach look competently well programmed.
Matchmaking is of absolute questionable quality.
Warzone is is just not my cup of tea in execution. I was never a fan of imbalanced games where someone can just use a weapon they unlocked and put into their loadout at any point during or before the match. I am especially not fond of games where powerful weapons are handed to players fro simply playing longer, and in the case of Mythic Month, given to those who shell out $10.00. This kind of gameplay is why CoD never appealed to me, why I didn’t like Halo 4’s Infinity multiplayer, and is why I am not a fan of Warzone. The fact that it is tied to the crappy REQ system doesn’t help me like it any more.
Theater mode is pretty much broken beyond repair. I think nothing more is to be said about it at this time.
Forge and Custom games is the only thing that appeals to me in Halo 5, and the fact that they are coming out on PC sounds really good for me as well as the fact that there is going to be a Custom Games server browser, that is if I liked Halo 5 enough to get them, as well as if I had friends that had Halo 5 or an Xbox One or Windows 10 PC to play them with.
The fact that there is no Splitscreen really hampers my enjoyment of this game as well. Most of my playtime in Halo 3 and Reach was with my brother in Splitscreen, and since it doesn’t exist in Halo 5, I can’t enjoy any couch co-op or any Splitscreen multiplayer.