You said a few things but just based off the title, why do you feel like you need to do that? Because of the videos you’ve watched or are you an empath?
I feel bad that I didn't take their advice and implemented in my life. And it's like I just keep craving for more and more. But what is the point of doing all this when you know deep down you have to go through the hard in life and it is a must. Without hard work life just does not reward you. You have to go through the pain, sacrifice and struggle. So this is why I feel bad that I've let everyone down even though I never met them in real life.
It sounds like parasocial guilt. They feel like they're letting creators and strangers down by watching all that content for years without actually taking action.