Instagram has released a new update that no one asked for and no likes May 11th 2016, here is how you can uninstall it to get the older version on android devices.
First of all you will want delete Instagram from your phone. After that is done download the last version of Instagram prior to the update/redesign [here]. After you have downloaded the app, go to the google play store and install an app called APK Installer.
After you have downloaded the app open it up and you will be greeted with the app’s home page.
From here all you have to do is click on the section named “install APK’s
From here you can see all APK files you have downloaded. just click on the Instagram APK you just downloaded. And follow the next steps.
From here just click on the install button, and the app will install the APK file with the old version of Instagram onto your phone.