It's easy to forget that Inkscape is run purely with volunteers, is a charity with 0 employees. I get that these problems are frustrating but maybe it would be more appropriate to wonder how is even possible that this project runs so well :D. Some technical problems are outside our power. Mainly performance regression was introduced by gtk3. Which was a big blow to the whole project because it took 5years of work. And in the end, we discovered that technology is just slow and we need to migrate once again if we want to fix it. Bugs are not ignored we just simply don't have enough manpower to fix them all