Never played Halo, but curious what they did that "run the franchise to the ground"?
basically people are mad cause they ain't Bungie.
Bungie made Halo 1, 2, 3, ODST, Reach. 343 took over (and Bungie went to make Destiny). They done 4 + 5 (and other Halo games) and of course are working on Infinite.
People want the "good old days" back where Bungie made Halo. There is a lot of nostalgia for the Bungie games so people are upset because they think the 343 games suck and can't live up to what Bungie did. personally, i think it's just a case of severe nostalgia and being unable to take their rose tinted glasses off. I enjoyed the Bungie games (never played them until a few years ago so have zero nostalgia) but think that Halo games only got better with each release. At least gameplay wise. IMO the only things i didn't like about Halo 5 was less Master Chief and some annoying boss scenarios. Was it the best Halo game? nah. was it a bad game? nah. after i finished it i remember thinking i can't wait for Halo 6.
the bungie games might have been damn good when they came out but they haven't aged well at all. if people want a Halo game to be anything like the Bungie games then that's not gonna make a good game. also, even if Bungie did come back to do Halo it wouldn't matter. they are only Bungie in name now and seeing the state Destiny is in...it's not something i'd wish to see happen to Halo.
halo infinite feels like a kind of soft reboot of the series. because of the hate Halo 5 got i think it made 343 got in that direction. instead of going straight onto Halo 6 they seem to be resetting the story and going in a completely different direction and abandoning the planned trilogy of 4, 5, 6.