Instagram has a way for you to see who you’ve interacted with least often: Tap your profile button (bottom right), then Following, and Least Interacted With. You’ll see the people you don’t often chat with or whose photos you rarely like and comment on. Simply tap Following to sever your Instagram connection with someone on the list.
You can also see the order you started following people. Back on the main Following page, tap the sort icon (parallel up and down arrows) on the right side of the screen and choose whether the list displays with your earliest follow at the top or your latest. Sorting by default appears to list them by how often you interact with them on the app. Again, just tap on any of the Following buttons to remove someone from your feed.
To disconnect with someone straight from your Instagram feed, tap the three dots in the top right corner of any post, then choose Unfollow. These unfollow buttons pop up in other places on Instagram, too: If you head to someone’s profile page, for example, you can tap Following, then Unfollow.
A variety of third-party apps also let you quickly unfollow other Instagram users, but you use them at your own risk (you’ll be giving them access to your Instagram account and data). Look for established software options built for social media marketers, like Combin. This service is free to use for a single Instagram account, will show you who isn’t following you back, and will flag accounts that appear to be inactive.
Unlike Instagram, Twitter doesn’t have a simple way of showing who you’ve interacted with the least. Instead, it’s up to you to sift through user profiles and see whether you still find their posts interesting (if they’re still posting at all). You can also tap Following on any account profile, and then Unfollow to stop following it.
There are a huge number of third-party tools that aim to help you manage the people you’re following on Twitter, but the platform has cracked down on the way other apps can use its service. That means these sorts of features are no longer available or are severely limited, at least right now.
One extra step you can take in the Twitter app is to open the Following page from your profile, then look for the Follows you badges. This will give you some idea of the people who are mutually connected to you, which might make your unfollowing decisions a little easier.
Source : https://www.popsci.com/story/diy/stop-following-facebook-instagram-twitter-snapchat/