No, the left main was not on the ground after touchdown for some time. The aircraft will not auto-deploy the spoilers nor autobrake until it senses weight on weels. It also locks out the thrust reversers. All for obvious reasons.

The left wing was lifting because they came in way too fast. 30-40 knots above final approach speed. That's why they landed so flat - if they had assumed correct flare AoA the airplane would have flown away from the runway.

This is the definition of trying to "horse it onto the runway".

Disclosure: Pilot on small GA aircraft but not ATP and not jet rated so YMMV. FWIW small airplanes are the same: if you're too fast they don't want to land. Bad things happen when you try to force them.

Watched the video and one of the main set of wheels was off the ground a good amount time. Applying brakes then would have gone bad, they would have skidded sideways. They also landed almost flat, front wheel touched the ground almost the same time as one of the back set of wheels, that just looked ... bad.

The key mistakes were that they had 11 mandatory go-around situations between 1000ft before touchdown and overshooting the runway and they didn't go around.

No, this stuff is all downstream of their terrible earlier decisions.