In general the Steam Deck is not the kind of device that is going to run things at max settings. You are gonna play at 720p30FPS low settings but be happy you can play at all on a train or airplane. It’s really meant to be a competitor to the Nintendo Switch than a replacement for a gaming PC.
You can stream from your PC to your couch or bed if you are at home.
lol your VPN company is going to kick you the instant you turn on LOIC through them. Your packets wont even get to the target site because you are basically attacking your own VPN.