"Look, I don't have the time to babysit or have a care. So, just go home or whatever universe you spawned out of, okay? I have enough problems on my plate..."

Peter said as he wave his hand off to the new recruit as a way of saying to 'get lost' but as Miguel said, The two of you were supposed to handle a threat in your universe and he seems to be the only one available for the type of threat.