I think purposely spoiling your ballot is a better signal to the parties that none of them are acceptable. Is that possible in your elections? Around here, a spoiled ballot is scrutinized by the party observers, so your message would definitely be heard.
I'd love to see a ballot with ranked choice voting that includes a none of the above option.
I could technically vote in 3 countries but I vote in none.
My preferred voting system is the ranked choice one in Australia but Australia also has compulsory voting which I disagree with.
I think in a democracy, it is up to the voter to decide if and how much they want to get involved in the democratic process just like a person has the right to join or not a parti, listen or not to a political debate and so on and so forth.
I wish the blank vote was more represented in the democratic process somehow but I don't really have a solution for this problem.