"Other" taking up 75% of iPhone 7 Storage

Hello, I have a 32GB iPhone 7 with iOS 13.5. My phone's storage is completely used up, and based off of the storage chart it looks like the "Other" category is taking up close to three quarters of it. I've gotten rid of almost all apps and I read up on how to reduce the Other category, but nothing seems to be working. I don't use the mail app (I use the gmail app), I deleted all web history from Safari, deleted attachments from messages, downloaded clean-up apps (they only clear up about .5GB), and deleting old conversations would only open up about 1 GB. Every time I delete an app to free up some storage it fills up again within a couple hours, so it seems like the Other category keeps expanding. My phone's been rendered pretty useless by the lack of space; most apps crash as soon as I open them, messages don't send/receive, etc. Is there anything else I can do to free up some storage from the Other category?

Thank you!