I'm sorry to see this man....Know exactly the feeling. to be honest, it doesn't look bad, the bumper did its job and the best thing is it didn't crack (at least not from the pictures) so, having repaired much heavier and worst damage, that literally will buff out.
Now the rattling issue could be due to the bumper bending with the impact and making the exhaust tips, which are attached to the bumper and not the exhaust itself, probably became unattached from its mounting points.