Aaaaaaand, debunked. (Or is it damage control?)
http://epicstream.com/news/News-about-Test-Audience-Not-Liking-Deadpool-2-is-False
This sounds more like the truth. I found it hard to believe that they could drop the ball that on this. And even if it were true, that's what test screenings are for.
This is the problem with internet reporting today. There's no accountability. Right or wrong, it's all about clicks. And if you're wrong, oh well, you still got your clicks. And on top of that, other sites will try to steal clicks from you by repeating what you said without ever trying to verify it first.