YouTube, Facebook, WhatsApp are not working right and internet is not working
Seems to me like you've removed some of the Google apps, used by these other apps. Which apps did you remove? I'd advise reïnstalling those apps, and don't remove apps like Google Play, Google Connectivity Services, etc.
Also, see if you haven't disabled some services or apps that YouTube, Facebook, and WhatsApp need. You should read the description on the Google Play Services to understand more about this.