Firewalls: Rant

Really?
I have to learn a THIRD way of doing firewalling?
First it was ipchains.
Then it was iptables.
Now apparently, that's not good enough, so I have to get my head around nftables.
On, but wait, this is OpenWrt, which has yet another layer added - fw4.
And all I wanted to do was upgrade the OS to get rid of a long-standing and very annoying race condition that would kill the WiFi at unpredictable moments.
Yes, I know I'm using this router in a rather different way from the usual, but sometimes people do things like that.
Sylvia.