Because you’re the sort of person that says “ooh both sides are the same”, but firstly that isn’t true they are very different political parties otherwise they would literally be the same party, they have existed for long enough they would have homogenized by now, and secondly even if it was true, refusing to engage in the political system will simply ensure that it continues to exist.

At least everyone else is trying to improve their lot rather than just moaning about it. Which is you’ve elected to do. Complaining without action is literally useless, if that’s all you’re going to do I’d rather you did it quietly somewhere else.