My page views in GA have increased abnormally because of bot? How to solve this?

Hi,

My website recently has increased significantly amount of page views (x5 daily, and non-stop since May), however, the unique pageviews metric didn’t increase. It causes our time on page metric drop up to 80%.

The source of this increasing view comes from organic traffic (as checking on GA). Please check this image for more detail:

So, I assume that it comes from bot traffic.

But i tried to block bot traffic through Cloud Fare setting but it didn't work. My question is how can I solve this problem? Do this situation has anything related to how I setup GA?

Please, could you help me answer this question or if you have any solution for this problem, please enlighten me

Our SEO effort was ruined because of this problem.

Thank everyone. Sorry for my bad English.