I feel trapped by the Facebook world, and its not a good feeling. I can't be the only one.
I don't have the facebook app on my phone - never have - but I've found that I can't avoid using WhatsApp - and it needs to be on a phone to function - as too many other people rely on it - that's just a fact.
Also for Facebook, its many people's entire online world - they seem to not even venture to "old fashioned" websites any more - its just facebook. So its difficult to avoid too. I log into facebook occasionally (using Firefox's Facebook container plugin) and discover people have sent me messages on it and expected a reply days ago...