I get two impressions: (1) the PM is a recent hire too; (2) he's a bully.
Further questions: Did the PM interview you before you were hired? Can you talk to the person(s) who interviewed you?
Based on your additional comments to @pedalpete, I would suggest talking to key people further up the chain of command and clarifying what the real, tangible expectations are. Long hours of busy work != effective work.
I fear you may have added poison to your situation by revealing your freelancing work. It would have been better to keep that confidential.
Further questions: Did the PM interview you before you were hired? Can you talk to the person(s) who interviewed you?
Based on your additional comments to @pedalpete, I would suggest talking to key people further up the chain of command and clarifying what the real, tangible expectations are. Long hours of busy work != effective work.
I fear you may have added poison to your situation by revealing your freelancing work. It would have been better to keep that confidential.