It's relative and no one should be demanding that you can clear Ultimates within 6 months of starting, however we should not be thinking in terms of skill caps. We should be thinking in terms of "How can I improve today?" Even if its a minor improvement today from yesterday, you do that every day and yes, eventually you will be able to do savage content. It's a lot about mindset. If you say "this is as good as Ill get", and dont seek to improve, then youre just giving yourself an out to be lazy or not care about content.