Harakets is a slang term derived from "hara-kiri," the ritual suicide by disembowelment. While the literal meaning is quite dark, in this context, it's used metaphorically and colloquially.
RAF Camora uses it to imply that his rivals are making self-destructive or foolish moves, essentially "committing hara-kiri" on their own careers or reputations, in contrast to his own success. It's a provocative and memorable word that highlights the competitive nature of the rap scene.
"Matrix" is RAF Camora's flex about status, wealth and staying true to himself while everyone around him fakes it.
He raps about his life on the move between Vienna and Paris, driving his Audi RS, dressed head to toe in Prada, with women doing squats to his music. He contrasts himself with a rival who fakes everything: designer chains bought on credit, staged photos with escorts, a following built on watching from the sidelines. RAF, by contrast, says everything about him is real.
The song ends with him planting his flag in Vienna's west side, calling himself independent rather than chasing hype, and repeating his tag "11-50" as a mark of where he's from.