There’s nothing to do…
I find that killing people keeps me going.
If you are already bored there is nothing we can do for you.
ok, so go read a book or something. I don’t see the point of telling us that you perceive there’s nothing to do in Halo 5. Unless you want some suggestions, in which case, try firefight.
If you can’t find anything to do with 19 different playlist and 6 pages of 12 custom games being played(not to mention you could host any game you want)… Also if you are only 8 hours in you certainly didn’t beat the campaign, at least on Legendary or get a lot of achievements. Should be plenty to do.