The ESC you have is a sensorless one (despite the slightly misleading way they name it). Compared to the sensored controllers most use for racing, sensorless controllers are not as smooth at initial throttle. This may be part of the problem - although I think the main problem is interference or voltage drop under load.
Diagnosing radio faults can be a bit of a nightmare though...
Try removing the equipment from the car, spreading it far apart, and testing again. If there is no glitching then you can be pretty sure it is something to do with your installation. To be honest those mains terminals you are using are not going to be very well shielded, equally you need to make sure the wires and joints are all in good condition and are not rubbing against anything that may conduct electricity (and that includes carbon fibre and carbon composite parts)
If the equipment still glitches, it is something to do with the equipment itself. Check the ESC has all the capacitors fitted as recommended. Try and substitute each part of the system for known-good alternatives and see what is at fault. I would be a little wary of the basic 27MHz AM radio, these are not always as good at resisting interference as more expensive equipment (although if it is the Kyosho radio then these are Futaba-made and are generally good quality for the price).
You also need to make sure the battery is fully charged and that you are not testing it when flat. Not only does that increase the chance of problems caused by voltage dropping under load, it is also likely to damage the cells.
Hope this helps.
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