2.4GHz WiFi module causing interference on 433MHz RF receiver module
Your 433MHz receiver module has a trimmer in the rf coil and no crystal, which suggests it is a superregenerative type. These have poor selectivity and so are prone to interference at other frequencies. It also has no shielding, so a strong rf signal could 'break through' and be picked up by active components on the board. The ESP-01's antenna is less than 10mm away from the 433MHz antenna, so the opportunity for interference is high. 

First thing I would do is rotate the ESP-01 180&deg; or mount it vertically, so its antenna is further away from the 433MHz receiver. I would also consider using a higher-spec superheterodyne 433MHz receiver, oriented so its antenna is as far as possible from the ESP-01 and with shielding around it if not already shielded.    

Your ground plane might be improved by moving it to the top of the board and routing more wires on bottom. That way it could act as shield preventing rf from the ESP-01 from getting into traces going to other parts of the circuit.