Hi, I had the same problem with an esp32 card the same as yours.
I did several tests (soldered an external antenna, changed the voltage regulator, added capacitors) which did not solve the problem.
I’ve seen a marked improvement in wi-fi performance by powering the board from the 5V (or 3.3V) pin instead of the usb connector.
I don’t know why, but it works well this way 
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