Is my ac unit working correct?

Quite understand your feeling, with the A/C technician not forgetting the responders ideas, perhaps try to lower the Temperature by dialing the thermostat to lower Temperature, ned to wait for a while to the temp to reduce, if this does not work, the other thing to bear in mind by adding to much freon can also overload the unit, the H.P switch will keep cutting off the compressor motor, finally the last alternative will be is to replace with a bigger unit, that will depend on you decision, good luck