cant play with 3+ friends

anytime since halo 5 launch me and two friends have been unable to play together in halo 5 unless one joins a match in progress because the game cant find a server “suitable”. yet were able to play any major triple A title like halo just perfectly fine no problems what so ever very little lag. So i dont understand why the networking in halo 5 is the worst out of all games we try to play. this is just ridilocus and ruins the experience.