My 2nd post in as many years (or should I say tears).
I did that (removed reliance on OneDrive). Bought a Synology NAS, which becomes part of your home network (if you have a remote location you own, you could use that for additional safety).
Synology comes with so many FREE apps for data access, use, and backup, as well as Cloud tools. Also has a plethora of security and encryption options if you want them. Using Tailscale (also free and easy to use) means my laptop, mobile phone, and NAS are invisibly VPN'd and I can access anything from anywhere in the world, instantly.
I then use OneDrive as the last-ditch backup of certain data on my NAS. So I'm NO LONGER DEPENDENT ON MICROSOFT, unless I have my laptop and NAS both go down, in which unlikely case, I'll be grateful it's somewhere.
The only reason I stay with them at all is because the $100/yr I pay for the Office365 for the apps and such, includes 1TB with OneDrive. Like it or not, Excel, PowerPoint, and Word are still THE standard, which is the only reason I pay for Office365.
Short version: Synology NAS are a beautiful thing that not enough people think of as a solution or normal necessity (like a TV).
Bonus: it's actually a 4-Core Linux computer with 18GB of RAM, and able to run many cool apps in "containers" which I'm still learning about.
Noteworthy: True to their word, after the OP didn't respond in time, Microsoft did stop monitoring this thread, or at least haven't since responded since, meaning our decision to be notified of replies to this thread, is more of a venting forum than it is likely to get a change by MS. Some tips like Chrome Incognito, raising OneDive bandwidth limits, and off-hours usage are helpers at least, but not an acceptable customer satisfaction solution.