This is just one release of GNOME 3. The GNOME developers are not
incompetent; these bugs in GNOME 3.10 and GNOME 3.8 are probably already
fixed in the latest GNOME releases. We just aren't going to get the fixes in
Trisquel 7 because of Canonical's (typically reasonable) policy of not
upgrading most software within an Ubuntu release.[1]
One thing I would like to see, mind, is GNOME having some sort of long-term
releases that get just bugfixes and nothing else, so distros like Debian and
Ubuntu LTS can use them.
[1] Your post is actually an off-topic rant about systemd, I know. But I do
think it's worth pointing out that a couple bugs isn't a good reason to
regress to old, unmaintained versions of GNOME. (I wouldn't be opposed to
MATE as the default Trisquel DE, mind, but I don't know if it suits
Trisquel's accessibility requirements.)