I can't speak for DinohScene but I can tell you why I quit using google many years ago. Other than the reason STwert already stated.
A. They gather, keep and never delete all information on users.
B. They for all intents and purposes are a monopoly (with over 90% of market share)
C. They rig search results so that you only see what they want you to.
D. They suppress any view not aligned with their own
These next ones do not specifically pertain to google search or chrome and maybe should be in a different thread but.
E. They discourage competition. If they see someone with a really great product they simply buy them out. Like youtube for instance.
F. If they can't buy great developers who are making ground breaking apps or apps they do not approve of, they simply find a way to shut them down.
And the list goes on.