MAG IPTV set top box with VPN trouble

I have a MAG322w1 set top box for IPTV and don't really want to run it without a VPN. I know there is no VPN options on the box itself so I am installing a VPN through my router. I have an ASUS RT-AX56U and I am setting up various servers in the OpenVPN Client. I have tried various servers with ExpressVPN and with NordVPN and only very very few work and those that do work are slow and choppy. The MAG box works well when not on a VPN so I'm pretty sure it's the VPN that I need. So does anyone know which VPN is best for IPTV through a MAG box? Please help. I have a 3 year old who is complaining there is no TV! lol.