The UFC's television ratings this year have decreased from last year, but for anyone following the sport closely, that shouldn't be a surprise.
There haven't been the quality of big fights and fighters since the UFC ended 2016 with such a bang. There were so many big fights in late 2016 that they had no major stars ready to fight when the new year started. So at the beginning of the year, the UFC was paying he price for such a strong ending of the prior year.
For the most part, the shows that haven't done well, are shows that weren't expected to do well.