A recent thread in this list is about how the sc-list is going to disappear very soon. My understanding is that, an archive will be created to keep all the past messages, but no future messages will happen anymore (but there is a forum too). I have been subscribed to the sc-list for eight or nine years already.... Why I did it? Homework. :D
...From my experience, the sc-list was glowing with concrete examples around the years 2014-2015, and during that time, lots of people were participating. I would really recommend looking back to those posts, and take the patience of evaluating the codes. Also from that period, you can find other"broader" historical, philosophical, rhetorical discussions about SC, music and mathematics, sc-quarks in existence, live coding, physical interfaces, etc
My general opinion is that, as you say, this list is not meant for learning SuperCollider. It is more of a resource to help individuals solving or discussing some of their very particular problems with SuperCollider. But if you have lots of questions, and you post them all in here, you might not get an answer for most of them (only one or two). A good hack to deal with this is "instead of posting all the questions at once, ask one, and then wait like a month or so to ask another question." But if you just complain about SC or if you just ask very general questions, then people might answer in a very general and bored manner in return. Otherwise, if you provide a more concrete code which for some reason didn't work as expected, people might provide a great answer in return. Slack and lurk chats are better suited for knowing the community (my opinion).
As this list is dying, it is possible that some current answers will not come with the same energy if asked today as the answers to similar questions that were posted in the past. Because people get tired of answering the same things over and over again. So a research and motivation from your part will be expected. And It is very noticeable when a question lacks these things.
Another recommendation I would give, is, download Miscellaneous Lib, and play with it just for fun! It has tons of examples, and it is very well documented. This library is soo thrilling, and the code is never broken; it even has GUIS, and lots of them! The craziest, but simplest Synthesizers can be found here too. Maybe it would also help to read some articles by Daniel Mayer, and to know that he also teaches a synthesis course at IEM Graz, Austria. If you are very interested in learning SC, maybe you could go to a place for learning it, with the adequate tutors, and environment (with people who also want to learn SC in a richer level).
Maybe you could also try to take private SC lessons from other people, if your current SC lessons do not suffice (for whatever reason). Some people that come to my mind are: Sergio Luque, Charle Hutchins, Bruno Ruviaro, Daniel Mayer, Julian Rohrhuber, Fabrice Mogini, Konstantinos Vasilakos, Nick Collins, etc Some of the names I'm giving might only give lessons through a university course, though :(
I do beleive SuperCollider is not for everyone. First of all, programming languages are difficult, and you have to be willing to learn it with the patience and craft that it requires. But maybe you could just try to do a few things with it, instead of learning everything about it. I myself am not a SuperCollider expert, and probably will never be one. I only use it as an ocassional tool, and for some specific purpose in mind. What I personally enjoy the most about it is Patterns, and Ugens. But ask me about signal-processing, Fourier Transforms, Convolution and all that, I don't know a thing.
My last advice would be: try to make a team of people to solve sc-problems, as this also provides a way to learn lots of computing. Many heads think better than one, and sometimes the solutions just come up in this way.
It was lots of fun to be in the list, and I made some abroad friends along the way. So Congrats for having achieved this great community! :/