If you can't be bothered to engage with politics...
...then politics certainly won't be bothered to engage with you.
Inaction changes nothing.
People fought and died for your right to vote.
It's your responsibility to carry out your civic duty.
This year's Budget was a Budget for the rich and the old. Why? Because they're the people who go out to vote without fail. It was a short-termist Budget to keep the core Tory vote sweet. There was nothing in it for younger people or the low-paid. That will remain the status quo until younger people become the demographic where an election is won or lost.
Why vote? Because it affects your future. It is in your best interests to engage with politics. You will never affect the tent if you're urinating onto its waterproof exterior. You will if you're peeing all over someone's sleeping bag. If you want to change the game, you've got to play it - otherwise you just end up being played.
By all means - spoil your ballot paper. I don't care what with, "none of the above", expletives, large phallic shapes, whatever. Your conscious abstention will be counted. Your reluctance to get off your backside will not.
So, please, go and vote - there's still two hours before polls close. You might even enjoy it.