what is wrong with Chrome?
Well, Google is an advertising company. They may have many other products and services, but these are really all just to create a better profile of you for advertising purposes - that's their main source of revenue. It's why Gmail, YouTube, and all their other services are trying to push you into using Google+.
So why hand over all your browsing habits to a company which has a history of repeatedly breaking and ignoring privacy laws?
Even after they have been caught, fined, and told to destroy that data, they hold onto it.
And frankly, I just don't think Chrome is a very good browser. Back when they started out and had the most barebones product on the market, sure it was quicker than the rest, because it was doing far less. These days it's not any faster or more memory efficient than the other browsers - it may appear that way due to its split process architecture though.