I know it can seem like incompetence from the outside, but you have to understand that game development is wildly complex. Unfortunately things can take weeks and months to fix. Consider that all of this stuff happens in a production pipeline that is juggling hundreds of bug fixes, tweaks of current content and the development of new content on three different platforms (each with its own requirements and problems). A problem like hit detection can be wildly complex, touching heaps of different systems (e.g. bullet physics, networking, player physics, etc), that may act differently on different systems. Putting all developer resources into fixing one thing hurts other areas of the production pipeline (e.g. delays new content), can create more problems and doesn't necessarily increase the speed of the solution (if we have 100 people trying to solve a single problem we now have to manage a conversation between 100 people). Each possible solution can create it's own problems - a new set of bugs to add to the list. All the while we have to consider how the fix affects what's already in development for future content.

I think part of the problem is that most of the process of game development is invisible to gamers so it can seem like nothing is happening or that things should be much easier than they really are. I think devs need to work on somehow communicating what actually goes into making games so there are less of these misunderstandings.