There are no FOSS alternatives for consumer use unless the consumer is an IT pro or a developer. Regular people can’t use most open source software without help. Some of it, like Linux desktop stuff, has a nice enough UI that they can use it casually but they can’t install or configure or fix it.

Making software that is polished and reliable and automatic enough that non computer people can use it is a lot harder than just making software. I’d say it’s usually many times harder.

I don't think that is a software issue but a social issue nowadays. FOSS alternatives have become quite OK in my opinion.

If computers came with Debian, Firefox and Libre Office preinstalled instead of only W11, Edge and with some Office 365 trail, the relative difficulty would be gone I think.

Same thing with most IT departments only dealing with Windows in professional settings. If you even are allowed to use something different you are on your own.