I hate OneDrive because Office apps have some extremely strange interaction with it. They are not always in sync with the main client.
There is nothing like changing an excel file, having it correctly modified locally but still seeing the old data in a linked PowerPoint because OneDrive didn't update.
It also managed to lose me a day of work once despite having saved the file regularly. None of my modifications were properly synched to the history.
I also hate how it pauses itself when I'm sharing my phone connection and tends to struggle when I restart it.
I used to really dislike Google Drive before my company migrated but between that and the abysmal outlook search I really miss Google.