Yep, the ADC in it's current state is a broken toy.
Also, the WROOM32 module has no saparate VDDA pins sticking out and even worse it is directly connected to the VDD33 internally without any LC filtering.
It will limit the ADC capabilities significantly.

Lack of p2p mode implementation is what holding us form considering ESP32 modules as a replacement of our current Broadcomm solution. Plaese, make wifi-p2p mode ASAP.