If I may paraphrase the Wikipedia article on the accident...
The Fokker 100 aircraft had a safety feature to throttle back an engine in the case its thrust reverser deployed during climb or cruise. Unfortunately, there was no indicator or alarm to notify the crew of the unintended thrust reverser deployment.
On the accident takeoff, a faulty switch cause uncommanded thrust reverser deployment. The throttle was retarded automatically. The crew, not knowing why the throttle had moved, manually overrode it. This left the plane with insufficient climb power.
Also, the crew had no training in this scenario, as training had been deemed unnecessary by the aircraft manufacturer.
So I don't think you can simply blame this accident on pilot error.