I have six Raspberry Pi's (from the Pi Zero W all the way to the Pi 4) plus several other wifi microcontrollers (ESP8266, ESP32, Pico W etc) doing things around my home and they all happily sit on my wireless network without an issue. Is it possible that your home is subject to some kind of interference that they are struggling to cope with?

I used to work support for an ISP and we would always get customers calling up complaining that our wifi router was shit, but it almost always turned out to be some weird unshielded device causing electrical interference (I remember we would always get a glut of these calls around December when people plugged their cheap Christmas tree lights in!).