I have some graphic design stuff to post on Instagram but no matter what I try, the image comes out blurry. I'd started with a file size of 1080x1080px when making in (currently using InDesign). I tried many export formats (JPEG and PNG in multiple different resolutions/ppis and quality). I even tried exporting to PDF and converting to JPEG but no luck. I've browsed some of the questions on here but I wasn't able to find a solution that worked for my problem. Can anyone help me?
Screenshots from Instagram (they look a lot worse on my phone btw):