I had a job that used COBOL and programmed in it. Its not terrible. It even works with sql.
The issue is the decades of code with little to o documentation, the fixes for issues like y2k that wirked at the time but now have problems, and greedy companies that want you to pay per processor. All the while you yourself are one of three people in the city that are looking to slowly pull everything out of COBOL, making it just a bit harder to get a job next time.