Probably because Jax didn't want to trade and him and hoped that he would be a man and abide by his legally binding contract. Unfortunately, Ramsey was a humongous vag who faked an injury and made it clear that he was never going to do the job he was being paid for. So the team had no choice but to trade him.
Agreed, he pulled some bullshit and I don't like this current trend. Not going to be any good for bad teams trying to get better if their young and cheap players pull this bullshit to go to contenders immediately.
That being said, this was a huge haul for the Jags. They played it as best as they could.