I do not know whether I should ask here. Even though I am still thinking about turning my not-used RPI Zero into a router. Now I have an old Archer C6 v2 with OpenWRT and sometimes happen router turns off after connecting the PC. I know it is possible to do it, but I wonder whether RPI would be able to hold the traffic better than the Archer. I should point out, that traffic means a Proxmox server with 2 Linux VMs and 4 PVEs, a television, and 4 Wi-Fi connections. I am thinking about configuring OPNsense on the RPI as well. Would it work or do you have better ideas?
Nah, even if it didnt have throughput issues it would be far more effort than necessary to set up.
My recomendation, get a used Linksys WRT1200AC and put openwrt on it. It’s basically as if they put a raspberry pi 3 into a linksys router, it has much more processing and memory than most cheap routers and you can get it used for about $50.