Why does Google Page Speed ​​swear at bootstrap?

Question

Google

Good day! I analyze the site and Google says that I have a problem with the content, actually here:

I have this style connected from the bottom:

Here is a link to the site . Why is he scolding him? Tell me what needs to be done? Thanks in advance!

Answer 1

It is better to include all styles in one file.

Answer 2

Tell me what needs to be done?

1. To score on this crazy service .
2. Fix bugs with fonts, reduce TTFB, set up browser caching.