(CNN) -- Here we go again.

Facebook has made big changes to users' pages, and people are responding in droves with their metaphorical "dislike" buttons.

News Feeds were popping with not-so-gentle complaints Wednesday as many of the social-networking behemoth's 750 million users began seeing the overhaul.

"This is absolutely the worst of the many wrong-headed 'improvements' you have made, and that's quite a feat," a user named Franklin Habit wrote on the site's official Facebook page. "I think Facebook's usefulness to me has now been outstripped by its lack of ease in use."

Others were more succinct.

"This sucks," wrote user Brandon Howell. "That is all."

To be fair, griping about Facebook changes is a time-honored hallmark of the site. Change is hard for some people, and users grumble every time Facebook revamps their pages.

And it's perhaps a touch on the ironic side that many of the current complaints are coming from folks who, in turn, complained in December when the current format was rolled out. Or the time before. And the time before that.

Which isn't to say that the changes aren't pretty dramatic.

Instead of defaulting to your friends' most recent posts, the News Feed (which people hated when it was introduced) is now topped in many cases by what Facebook calls "Top Stories" for you. It uses an algorithm that combines such factors as which friends you interact with most and which friends' posts have the most comments and "likes" on them.

COMMENT: the facebook users are unhappy with the changes they have made also as I.
I dont like the changes because I cant handle with it is more difficult and I dont understand it very much so I want to facebook return as it was before because many persons also as me dont like it.