lol- @3SailAway I came on here to say exactly that: “comparison is the theif of joy”
You are somewhere in the 16-18 range, eg still actively developing. Your brain is about to have a huge growth spurt- the biggest it’s had since you were a baby. And you are cherry picking examples to beat yourself with for not knowing everything right now! That is a waste of time and energy.
Coming of age stories are all really the same story: a protagonist who in some way doesn’t fit in and is looking for where they belong in the world has a series of adventures, most of which are unpleasant in the short term. Each of them tests their mettle and/or teaches them some sort of lesson and over time the protagonist finds their own voice, their own path. The original, ostensible, objective is achieved but by then the protaganist has grown into themselves and has a bigger path to follow.
Go be the hero of your own story and remember:
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it’s not an adventure without snake pits (cf Indiana Jones); and
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you never, ever, ever know what’s behind the facade people present to the world. The only humans who don’t have any self-doubt are (pretty definitionally) sociopaths. And there are no humans who never have a bump in the road- but there are lot of people who are really, really good at hiding it!