I just reinstalled 3.4, went through the same process, and was able to get the right on the d-pad working.
However, the third and fourth controllers still don’t seem to work when playing games in RetroArch. I can see and configure all 4 controllers with ES, but only the first and second seem to work.
Please if anyone has been able to get four DS4 controllers working simultaneously, let me know. I’ve been trying for weeks now, and have been through petty much every tutorial I can find to no avail.