I feel your frustration. I don't like it when things break,
especially during a performance or recording. However, I'm not sure
what you're want to accomplish by declaring that too much software
is broken *and* that you're not going to take part in the fix-up
process, at least not by making bug reports.
But the plain fact remains that for *your* purposes it's true that
there really is too much unfinished stuff out there. You come from a
world where music software is packaged neat and ready to roll, and
you are now trying to reach your musical goals in a world where no
such packaging exists as a matter of course. Frankly, I probably
wouldn't bother. I was initially attracted to Linux because of the
software it ran well, and fortunately for me it suited my musical
tendencies. Today, most of the software I use - Csound, Ardour,
LADSPA, SuperCollider, etc - is well-established and
well-maintained, with large and active development and user groups.
You're using some of the latest things to evolve in the Linux audio
world, e.g. synth plugins and pattern-based audio sequencers, most
of which things have been in consistent development on Windows
and/or the Mac for many years. Unfortunately for you and other
musicians working in your artistic domains attention in Linux audio
has been paid to other directions. I do see things improving in your
direction, but only by fits and starts, hence the many
unfinished/broken projects. Alas, beyond bug reports, I have no
suggestions that will radically or readily improve the situation,
though I do seriously advise using money - a.k.a. the universal
solvent - as an incentive/motivator.