If you're looking for an arcade, check out the supertuxkart/extremetuxcart packages: those are "Mario cart" spin-offs with Linux mascots instead of Nintendo characters.
If you're looking for a racing simulator, check out torcs.
In general, Debian has metapackages for popular game genres, e.g. racing.
The issue is somewhere between the switch and the RPi.
Switch was a DLink DGS-1210-24.
I changed switch, no more issue.
As a workaround when still using that (manageable) switch, I had forced the port to 100 Mb FD, obviously not taking advantage of Gb Ethernet, but I don't need it, while I really need Ethernet...
It could be that DFS/TPC channels were disabled because they used to cause issues such as this one.
If you weren't affected by these problems, try getting WiFi chip firmware from an older Pi OS image. The files you need are located in /lib/firmware/brcm/, on my Pi 4 the brcmfmac43455-sdio.* files are used.
Changing the country might also help, but this may ...
You might begin by verifying the pin numbers. WiringPi uses a numbering system that is different from other libraries. A good source for wiringpi pin numbers is the Raspberry Pi Pinout website. Clicking on a pin - for example GPIO 4 will reveal the numbering system specific to the wiringpi library. You should also take a look at the documentation for the ...