Google and its shortfalls

Has anyone with a website noticed recently that Google has decided to downgrade quiet a lot of its very long serving loyal websites for one page holding sites.
One of my sites in the last three months has been loosing its ranking daily, not through lack of content but just because Google has decided to lower its rank, maybe its because I refuse to pay to advertise my site at there premium rate, but who really kknows. All I really know is that every time I search it there it is lower in its rankings, Google get a grip you are only as good as the people that use you, and in this day and age that is getting less and less.