Android has a massive lack of quality control

If you’ve ever used an Android phone in the past year or two, there’s one thing that you can immediately notice; it’s slow. Things just don’t move as smoothly as they should, things crash, and just the overall experience is pretty sad. Android has been around since 2008 and is currently at 3.2.1 for tablets and 2.3.7 for phones. Now I want to make one thing absolutely clear, I’m not hating on Android or loving one Operating System over another, this is just purely tech observations about my experiences with one OS and comparing it to another. I have no intention to single out a single OS or make one feel superior in any way. With that said, Android as a whole has a very massive lack of quality control. Why is it ok for manufacturers to think it’s ok to ship phones with buggy ROMs or with things that just don’t work? The sad part of it is that customers just accept it and go about their way. Granted there are ways of fixing things, since you can root your phone and gain access to everything. However, if the issue lies in the drivers, you have no control over these. So what aspects of Android lack in QC?