He was horrible. The Ravens wanted him off the season he rode off the coat-tails of Sparano. Then they called him out after they ended up with Harbaugh who ended up winning championships. When rumors were afloat that the Rams were going to hire him, the FO was inundated with calls from fans furious and they denied it ever happening.
Jones gave Garrett the biggest leash ever and did everything in his power to let him succeed. Jones gave Garrett all the space he needed, and leveraged draft picks to get Roy Williams in an attempt to help his stagnating offense. If he was anywhere else, he would have been fired long ago.