Question Connecting a brand new Samsung Q60 Smart TV (2021) to a computer ? Question High CPU usage when internet connected

If there's something I can do or information I can find that could help any of you to tell me what's going on, I'd appreciate it. My router automatically assigns every connected device an IP4 address (10.0.0.X) and my IPv6 address I can seem to get just by googling 'whats my IP'. I've tried port forwarding, and I admit, I have almost no idea if I'm doing it correctly. Before we tried playing Borderlands 2 together, with me hosting the game at first, when she would join her character would just endlessly run off to the side and she said on her screen things were just jumping around before she got disconnected. This isn't the first time we've had problems either. An older title like this on her brand new computer shouldn't take that long to load and connect. We waited a good 5 minutes before she just gave up. I've tried running a dedicated server, and the steam servers claims that my friend is connected and 'validated', however on her end, all she see's is an endless 'validating game resources' progress bar. My friend who is trying to join me, who uses the same internet provider, cannot connect to my server.

My brother, in the same house, can join me just fine. What I mean in this case is, we want to play Sven Co op together. My friend is having problems connecting to games I run sometimes.

How to play sven coop with friends