How is hale 4 a bad halo game? I don't think a lot people agree with this.
Yan
1. sprint elongating maps
2. armor abilities
3. loadouts, especially including plasma grenades, plasma pistols, and boltshots
4. perks throwing out even starts
5. no weapons on map in most game modes
6. personal ordnance handing people power weapons
7. killcams
8. instant respawn
9. join in progress
10. awkward, laggy and cumbersome menu UI (especially after Reach)
11. poor DLC map integration.
12. poor covenant AI
13. no campaign or spartan ops theater
14. missing classic gametypes, with fundamental changes to existing ones (most being negative)
15. no in-game ranks. the progression system that was in game was short lived.
16. file sharing didn't work for the first few months of launch
17. waypoint website was cumbersome to navigate and missing features in comparison to bungie's halo-era site
18. story requires outside sources to fully grasp details
19. missing features in forge
20. generic weapon sounds in place of iconic sounds
21. lack of larger environments, meaningful set pieces and battles with decent scope in the campaign
22. HUD clutter, announcer spam, medal saturation, list continues
23. missing vehicles and weapons replaced by dull unimaginative ones (e.g. sticky det vs grenade launcher, mantis, etc.)
24. poor sound mix (can't hear dialog in-game, loud menus, loud abilities, etc.)
feel free to add. the list for reach is just as long, but there were lines even that game didn't cross.