Dragon Age Multiplayer lag

So, I made a few forum posts where I talked about issues with the game, and didn't reply. Sorry about that. I was both busy, and the issues in question were manageable or didn't happen a lot. Now I have a new problem, though.

I understand that this is an old game, and it's full of bugs and lag. Lag off host is a common problem in many games and it's pretty hard to fix. There's going to be some lag, no biggy.

The issue is though, today I joined a game hosted by someone from Ukraine. Actually, it was three games, I think. The second game, my computer randomly turned off (another problem I mentioned having earlier). I was invited back, and the lag was unbearable, both for the rest of that game, and for the next one. I had to leave. The problem is, my entire game now is just as laggy as when I joined that guy's game, even when I host my own games or I'm just in the menu, changing my equipment.

Uninstalling and reinstalling the game didn't fix it. Neither did closing my computer.