Flippantly insulating the Linux devs is not the way to improve things. It has evolved and continues to do so. There are far more GUI tools for managing things then there has ever been. The only thing you have mentioned in your post is AMD GPU overclocking - not something I would consider a novice task nor something most people are going to want to do. So the priority to get a GUI to do this is quite low. Hell, it looks like there are no userland tools at all - only raw kernel interfaces. So it is really something we are lacking any tooling at all - let along GUI tools.
Better to advocate for these tools than insult devs for not having yet created them.