What impacted Halo 5's sales the most?

[Cobretti2]

For me it is the Halo MCC debale, FU if you think I am going to download a 20gb file on launch day to get the complete game because they wanted to squeeze it all on one disc.

It is very simple

It was a COLLECTION

Disc 1 = Halo 1 and 2
Disc 2 = Halo 3 and 4

No one will whinge having two discs for FOUR!! games.

After that point I stopped caring about Halo 5 and from the sound of it from comments here looks like 343 turned it to shit anyway.