Thanks for the feedback.
I see you also saw my reply to a similar review that was posted a couple of weeks ago here:
https://www.ads-software.com/support/topic/jetpack-is-the-best-choice-to-make-it-a-very-slow-website/
To control the performance of your site, you will consequently need to decide what features are worth a performance impact when configuring the Jetpack plugin on your site.
When optimizing your site’s performance, I would recommend that you start by looking at all elements that make calls to third party services, like sharing buttons for example; those are the most likely to impact loading speed on your site.
I hope this helps. If you’d like me to dig into this with you, don’t hesitate to send me more info about your site here:
https://jetpack.com/contact-support/?rel=support