BUT, there is this song here which made me realise that something is wrong. https://www.youtube.com/watch?v=rRaDQBMMbrM
At the verse riff especially, i can't keep going for more than max 7-8 seconds at full speed before my whole picking arm becomes super tense, and the speed drops so i can't keep up.
I have tried everything to fix my picking issue, but everything I do I fail at.. I simply can't get to a proper level of speed when alternate picking, some people would even say that this song i linked aint even fast. And when i watch people play a cover of it on youtube, they don't even seem to struggle with the picking at all. What can i do :( i feel like i don't even want to play any more if I can't fix this thing....