I see a lot of disingenuous hyperbole around here.
The collection was fully content complete at launch, the MP is what suffered due to horrendous coding.
The campaigns were a collection of some of the greatest games of all time running at the highest fidelity ever released at a time (with some bugs, personally I played through all 4 without a single bug as did mang, not discounting anybody who did experience bugs though), as well as an amazingly faithful remake of Halo 2.
They not only followed up on their fuck up, they are going BEYOND what they messed up and improving a lot of what was already functioning. Composer, modern aiming, custom playlists and server browser, seasonal themes, even esports circuits. It's no longer a collection but a platform now.
It's easy to come into a thread and shit post because everybody else is, but actually researching the topic and reading the article is apparently not a lot of your strong points.
And this is coming from THE MOST disappointed Halo fan when this game launched.
Kudos to 343 to making good, despite a quite obviously unforgiving audience of gamers.