I had enough experience to recognize problems, and discuss them with my family, but these were intro courses meant for beginners who generally wouldn't know. Teaching bad habits to beginners who may carry them on for years to come is problematic. We did leave feedback pointing out the problems we saw, and that was several years ago now, so I don't know how things have changed. Hearing that you also notice problems that need to be ignored makes me think they have not taken such feedback to heart. The poor intro classes teaching beginners bad habits was enough that I don't want to support them at all, even if I personally could filter the info.
I've heard of GameDev.tv before, though we have not done any of their courses. We will check them out to see if anything is interesting, thanks. We mainly used the courses as a way to learn the basics. We have several dev YouTube channels we watch sometimes when they have tips, but mostly we learn by running into a problem and looking for a solution, or thinking of something we'd like to do and searching for info on it. Sitting and doing a full course is not our preferred learning style, and generally only for something new where we need a foundation to build on. Blender is something we are still only dabbling as we mostly do 2D currently, so those courses may be worth a look when we are ready for more in-depth 3D modelling, thanks for the tip.