No, it isn't. I'm pretty sure the Bill of Rights is still a pretty good set of basic rights. Would you be willing to roll the dice on throwing a random out to get a new one? That is what can easily happen when you make changing it easy enough to be done quickly.
Also, why would you want to change the root of all laws at any crazy rate? There is a reason Congress makes new laws, and states make new laws, every single year. You should not need to make drastic changes to the base legal framework just because someone invented an internet - you should be able to apply current legal frameworks, and if that is not enough, make small changes to address such changes. Even small legal changes at the Federal and local levels have significant cost to make needed changes throughout society. Now allow tinkerers to make constitutional changes willy nilly, and guess what the cost will be.
Or do you think it would be better for short-lived political trends to simply rewrite major sections of the Constitution every few years? That seems like an absolutely terrible way to plan a stable society.
>We used to update it every decade (at least). Something has changed, culturally,
Conversely, maybe the overall framework is pretty good, despite each subgroup not getting their way, so it doesn't need changed to add amendments for every tiny whim.