Indeed our voting system has a lot to answer for. No government since the 2nd World War has had a majority of the votes cast, despite sometimes having a large majority of the seats.

Labour in 1997 with 179 seat majority on 43.2% share of votes cast.
In 2001 167 seat majority on 40.7% share of votes cast. The two largest majority governments on seats since the war.

Is the present system the best for the country? Probably not.

Is the present system the best for the two main parties? They seem to think so.

I don't expect things to change anytime soon, apart from the party in power of course.