I think it will be better with a little bit higher marketshare, but once the masses come in they demand stuff like kernel-level anticheat, DRM and to never accidentally run things in a terminal and then it will become way worse. Linux is as user-friendly as it is, because it is used by professionals and power users and the masses use something else.

That's why we have different distributions. Let one of the distributions cater to those who don't want control of their own computer.

Yes, and this is how a healthy OS market should look like, but a lot of distros use the same kernel.

Linux can exist because there is a huge industry producing inexpensive open hardware. If that industry transitions to producing only locked down hardware, it will hurt Linux and all open source software. Be careful what you wish for.