This is only true if one side asymetrically stops voting, giving the other side a decisive victory over the other.
How to improve the system is a difficult question; is it done by participating (and hoping the person elected makes a change) or is it done by "voting out" and building a better alternative?
Tangent, but You may find this interesting:
https://www.youtube.com/watch?v=qf7ws2DF-zk