Whether you watched a guide or not, the way you learn a raid is practice and playing. I've explained SotP for a lot of people so far and it's always the same: Once they played an encounter a couple of times, they'll start to get better and better until the damage they deal is enough or they are fast enough. If they don't have the weapons you would normally use: Fine, we'll make it work! The great thing about raids is it's not important if "the new guy" doesn't carry his own weight, if his teammates are good enough, they can keep an eye open for him. If that still doesn't work, you can be sure "the new guy" will get better. Raids are not activities you need to complete on your first try and the strategiess the streamers use are not necessarily the best. I've played GoS three times so far and we never managed to finish the boss, but that's ok, we'll try to do it next time. It's meant to be hard, so there'll always be people that lack patience, but why does that affect you? Open up your own fireteam, search for likeminded people, make your own strategies.