This is patently false, the only evidence of backlash has been from reports in mass media, we were all loving the new newsless Facebook.
On this particular issue Facebook is clearly in the right, it is straight up insane to expect them to pay for links to news that users choose to share.
I only use facebook for extended family and friends of the family and noted a lot of people pissed off about not being able to share links.
The sad part is that it's not entirely unjustified. It's just in this instance Facebook was objectively not being the bad guy, yet there's enough mistrust in the population that it's easy to be told that they (facebook) were in the wrong.
There was already a lot of anti-facebook rhetoric here in Australia as a result of perceived left-wing bias and censorship on Facebook’s part during and after the US election. Anecdotally, I’ve noticed it’s basically the same type of people in both cases – uneducated right-wing anti-vax flat-earthers.
It works in both ways. Anectdotal evidence is not quite evidence.