If your happiness is dependent on the attention you receive on these social media apps, there are likely deeper problems that you should address beyond simply deleting the app and telling everyone else who uses it to do the same.
There's a certain irony to all of these posts that have been cropping up lately on how "I deleted (insert social media service here) and it made me happier". Many of these posts cite the cessation of the race for validation as the reason for their increase in happiness. If you weren't expecting the same validation that you got from the service you just left, would you have really made the post? Couldn't you have simply just quit and be done with it? Deleting Instagram may temporarily improve your mental health, but it isn't a cure for a deeper underlying problem.