The adjective, as opposed to the noun, wasn't accepted as the answer for Malaise group. One of the groups was very easy to see....

Who gave you access to a keyboard?
The Kubrick film is called "2001: A Space Odyssey."

This doesn't work unfortunately - the title of the Kubrick film is '2001: A Space Odyssey', not 'Space Odyssey'. And the four dates are a very easy group to spot.

Perhaps people are being a little harsh. It's a good concept, challenging and also lightly themed. However there are glaring mistakes as the others have mentioned that really do ruin it. Keep trying, you have good ideas, but make sure everything is sound. Don't use numbers like that without red herrings, far too easy, and annoying as it doesn't feel like a full puzzle.

I'm with Fridge - so keep them coming -

Ok but yeah, the numeric group sticks out. Found this made it very quick

A little easy. The answer for the Malaise group was overly restrictive

Tough but enjoyable.