You might try adding more gateways to the conf file?

Or if you’ve got a host your trying to connect to I think I’ve seen people get a VPN connection through ssh? https://wiki.archlinux.org/title/VPN_over_SSH

Can you set your NAT to port forward a port to your ssh host?

I’m currently using yggdrasil to deal with this problem, though I’ve also used tor hidden services.