I get it; the entire system sucks. Even here in the Netherlands with a dozen political parties, you rarely get the government you want. But there’s still things you can do even if you really don’t want to vote in this particular election.
You can support groups that promote voting reform, like ranked choice voting. You can and should vote in all local elections. You can even RUN in many local elections, since candidates frequently run unopposed. You can help inform others about the voting process and get poorly represented groups to vote. If all else fails, there’s always the option of shooting your least favorite politician or doing an Oklahoma City. But try those other things first, OK?