I’m surprised that you had trouble port forwarding on airvpn. My understanding is mullvad doesn’t allow port forwarding, and Proton allows it but it’s extremely finicky and you have to constantly poll for it with some script (or maybe if you use their official client then you don’t need that, but I didn’t). Port forwarding was, why I went with airvpn.
I’m surprised that you had trouble port forwarding on airvpn. My understanding is mullvad doesn’t allow port forwarding, and Proton allows it but it’s extremely finicky and you have to constantly poll for it with some script (or maybe if you use their official client then you don’t need that, but I didn’t). Port forwarding was, why I went with airvpn.
Tbh, when I tried it, I was completely unfamiliar with port forwarding, so it was more of a me thing.