Mine is that the useState hook is an actual plague on the entire React ecosystem. Regardless of your opinions of React, if you wanna use something then use it right.
SharePoint, Teams, OneDrive, Entra ID and M/O365 aren't "stupid". Your problems and complaints are the result of user error (although, to your credit, Microsoft in no way makes their intended use obvious or intuitive).
Don't take that as an endorsement of them or Microsoft. On a consumer level, you should actively avoid them all. I'm referring to people who have to use them at work and complain about intended behavior being "stupid" or "pointless". If you learn enough about how it works, you realize it either makes sense or is simply a limit of "the cloud".