Plastic box not property installed, not workmanlike, nec110.12 & 110.13 (A), should be secured
Romex not properly connected inside box.
Not sure:
Can't tell if the Romex is 12-ga wire (not yellow) or protected by 20-amp breaker? Kitchen wall circuits to be 20 amp. IRC E3703.2
Range hood or microwave manufacture may require a dedicated circuit, requiring the duplex receptacle to be switched out for a single? Never seen this before on an micro or hood appliance, kinda of a stretch I think, but possible.