serial port through Rx and Tx want work
You're using a USB to RS-232 adaptor. That is wrong.

RS-232 is not (electrically) the same as UART.  Not only is the logic inverted, but it uses ±10V NRZ signalling.

That means that when the UART expects a 3.3V HIGH signal the adapter is sending it a -10V signal. When it's expecting a 0V LOW signal it's being sent a +10V signal.

So yes, it's gibberish - it's getting the opposite of what it expects to see - and the excess and negative voltages risk damaging your ESP. Fortunately the currents involved are usually so low that it doesn't damage it straight away, but with prolonged use you can probably kiss your ESP goodbye.

Disconnect that dongle immediately and get a proper USB to UART adapter.