Ain't that the truth.
So, a teenager feels apathetic... and you're claiming this is a new development?
> politics won't change a single thing about my life which couldn't be changed through more hard work
Hard disagree. It won't immediately change anything. But on the scale of months, years, decades? It has the potential to change nearly everything. If not for you, then surely for the marginalized.
If you're from the UK - Brexit was not an inevitability. Different parties in power, even a different PM at a certain point, and it wouldn't have happened. And it's demonstrably wrong to claim that isn't changing the lives of everyone in the UK by a huge amount.
If you're from the US - are you really so dumbly apathetic that you're going to claim that the choice of the next president won't affect your life?
There are a few countries that are stable enough (currently) that an argument could be made any political actions like voting won't change much. But these countries are few and far between,and even those are not guaranteed to stay stable.
https://bazhum.muzhp.pl/media/files/Studia_Humana/Studia_Hum...
Maybe that is true for you, but this is not true for minorities and people who are fighting for a cause (abortion and trans rights, for example). Not being willing to cast a vote because it doesn't change anything for you doesn't seem like a virtue.