I'm looking for recommendations.

I have run Linux on my own computers off and on for the last 10 years. I'm not an advanced user, but I'm comfortable enough playing around with different distros and settings to find a good fit for myself and my own devices, and problem-solve as needed.

But now with the end of Windows 10 looming, I need to upgrade a family member's computer to Linux. This device is only used by people whose attitude toward computers is "if it doesn't just work, it's too hard and I can't engage". So this needs to be something that both is not going to break on its own (e.g. while doing automatic updates) and also won't be accidentally broken by the users. As well as not being too steep of a learning curve for Windows users. (Their needs are uncomplicated - mostly just LibreOffice and Firefox, both of which they already use.)

Mint is often recommended for inexperienced Windows refugees. But I've had several things break in the process of getting Mint installed and updated on this machine. That wouldn't be an issue if it were my own computer, but it's not filling me with confidence that this is going to meet the ongoing "just works" requirement for this device. There's no way I'm going to be able to handle long-distance tech support if things break more than once in a blue moon.

Which other distros would you recommend for this use case?

Thanks in advance.