I doubt 2500 hours of multi-pilot flying (assuming he got command shortly before the accident, which may not be true) is enough to be captain on an aircraft of this size and complexity.
2500 hours of actual handling time is a lot.
2500 hours of monitoring an autopilot is cr@p.
Judging from how content the crew was to live with INS errors, they were just taking things as they came and were not being proactive in getting their aircraft ready for an approach.
Judging from the accident report, everyone at the airline had been taking things as they came and were not acting in a forward thinking mode.
That is how you get hurt in aviation.