Is it normal that i can't stop comparing myself to other people?

Be extreemly careful who you compare yourself with.

Most people compare themselves in an area of life to someone who has often spent a lot of time (sometimes decades) becoming good at something.

It's a false comparison. You need to compare yourself to people who are at the same stage as you. If you are a beginner at something... compare yourself to other beginners; 1 week, month, year into something - against other people with that amount of time into it. Not to the highly skilled with lots of experience and practice.

You also need to look at a group... there are a lot of beginners. There are a lot of people with the same amount of time... Look for the average of the group - not the shining star. Compare yourself against the average of your peer group.

Of course, you're a weak sodding loser.

It's something a lot of people struggle with, especially when they're young. Social media definitely has not helped things in this regard.

An important thing to remember is that social media is a facade. People only share on there what they want other people to know about them, and typically don't post their own problems and bad things happening in their lives. Some also really embellish certain things in their lives. So, take anything you see on there with a grain of salt. All of those people have their own issues and struggles as well, they just don't put them out there for everyone to see. The difference between what you know about everyone else's lives and what you know about your own is that you know every detail, good and bad, about your own, but only know what the others are willing to share about theirs. Only the most flattering photos are posted, as well as their accomplishments. You don't see them when they first roll out of bed in the morning, or hear about stupid decisions they made that resulted in consequences they had to pay a price for.

i think it's *normalized* or at least getting normalized, but it just sounds like you're not happy with yourself - try to focus on stuff you really like and ask yourself questions and to focus on yourself & what you can do instead of trying to be like others if you can

Pfffffft.

That came from a critical and condescending upbringing. I went through the same thing. The after I moved out and went to visit my mother, I heard how judgmental she was, and realized where I got my feelings of insecurity. You can work through it.