I have been using avast pro for probably 2 decades and during that time I've seen some bad releases that would cause all kinds of things, was I frustrated...Yes, even few times I thought of going to something else, but there is no perfect thing in this world and as always avast team would fix the issues , maybe not right away, but they would get to it and they will get to this one I'm sure.
This time is no different, the latest update is bad, GUI loads like snail and without renaming of the dll's there is no go with any of the browsers, so hopefully they will get to that issues soon enough.
As far is Windows been venerable or sucks, yes in some ways, but other platforms have their share of horrid if not with venerability than compatibility and limitations in many other aspects, it is what it is