I installed the new Visual Studio 2019, but it is much slower (at least in my machine) than the 2017 version, and working is getting very frustrating. I want to get back but I can't find where to download the previous version.
You just need to access -downloads/ and If you get the same message than me, just join to the Visual Studio Dev Essentials (in the same page is a link to do it), it is free, and then you can download older versions of Visual Studio.
I was having the same issue (even with Dev essentials and I didnt have the option to download vs 2017 community, but 2017 professional instead), then I finally tried downloading the professional version (Then I just cancelled at the moment it asks which components) and suddenly it unlocks the 2017 community install in the visual studio installer hub.
I downloaded vs 2019 community edition, i installed the installer and quit the components window, and then downloaded vs 2017 enterprise installer, as the community release is not there, after executing the enterprise installer, the vs 2017 community edition was appeared instead of enterprise and that's it :)