Atrocious piloting leading to mass death here most likely. Bird strike, but the plane was not incapacitated. There was what appeared to be a single engine failure. The pilot seems to have panicked and made a series of terrible and fatal decisions. Flaps weren’t lowered. Speed brake was not deployed. Didn’t attempt a gravity drop of the landing gear. That airport has a short-ish runway (2,800 meters) and even with all that, he still would’ve been ok if the runway had been longer.
My personal guess is that the pilot turned off the wrong engine (the working one) while attempting to land, in addition to all those other probable fuck-ups. It’s also likely the pilot didn’t realize the landing gear was not extended in what was obviously a panic situation they were unable to deal with.
The investigation will reveal more, but that seems like 100% pilot error to me. A bird strike with a single engine failure simply cannot cause all those problems with the triply-redundant systems on that aircraft. It is just not possible.