Fragmentation is not a bad thing but I agree that instead of making programs deeply related to their DEs, they should keep that minimal if that's possible. Like I mentioned, Flatpak mostly solved this issue. Bazzite uses almost everything from Flatpak which is actually good from this point of view (while it might have other challenges on its own, like not everything is on Flathub, gets better though).
I would say even Ubuntu with telemetry is leagues better than a cleaned Windows 11 when it comes to privacy, but I understand what you mean.
Not sure when did you switch but if you're kinda new with Linux, it just needs time to recalibrate your knowledge. Once you learn the best for your every need, things like these won't be an issue. I wish the defaults would always be the best. Some distros actually pick their pre-installed programs really well, but most distros usually go with default suites, like if it's KDE, then everything is KDE because of the integrity.
I see. Well, while GUI has improved a lot on Linux in recent years, if you still want to know it fully, you'll need to learn the CLI part. CLI on Linux is really powerful and that's why you usually won't find any forum replies related to GUI. That might seem a down part for people who are new to Linux, however it makes it easier for the people who are trying to help. Sadly you can run into jerks and gatekeepers everywhere but fortunately they are not a big portion, they just talk loudly.
Once you learned the CLI, it's almost always the same and it changes very little in time. This is the hard part and normal user don't need to know CLI anymore, which is why the desktop Linux adoption gets better nowadays. But if you're a power user, you'll need to learn the CLI, at least the parts you require.
Sorry, I should've mentioned it at least once. It means desktop environment. You may also see people talk about WMs, those are window managers. Every DE has a WM, but if you decide to use a standalone WM, you'll need to install every other software yourself which normally come as bundled in a DE. Of course, I'm not talking about distros that come with WM options. Those usually cover the software part pre-installed. If you don't want to configure anything on yourself, DEs are the safe choice here. If you enjoy configuring everything (at least I'm looking at it that way) to your needs, you usually do that once (and upload your configs to your personal repo, that way when you need a reinstall, you just pull your configs from
gitand you're ready to go). That's why Linux veterans seem to prefer WMs a lot. There is no limit to configuration, this is both pro and con, depending on where you stand.Regarding not auto-mounting, the main reason there most likely security related. Again, I agree that more distros should offer more visible options related to that, though some distros already do that. But it should stay as a choice. There are differences between Windows and Linux and this is one of those. If you're talking about the filesystems on the disks installed in your PC case, they'll auto-mount if they're a Linux filesystem. As default, this won't happen with NTFS partitions.