I agree with you.
There probably is no such person, and that might be a good thing.
The fact that some votes cast don't count or don't affect the outcome of an election means that, for some people, in their part of the country, the party they support is under-represented and does not end up in Parliament. Others, such as youth and seniors, feel that applies to their whole demographic, and still others perceive the problem as one that affects people of a particular gender or minorities of all kinds, be they linguistic, ethnic or otherwise.
That's why it makes sense to start by clarifying what we mean by a vote that doesn't count. We all have a slightly different perspective on that. People are frustrated about this for different reasons, reasons that can affect their preference for a particular voting system over others. That's why I think it makes sense to address this issue first before confusing people with all kinds of voting systems and mechanisms.