Absolutely not, at least here in the UK.
The question can be viewed in a couple of ways really, depending on how you determine "success". Some people may argue that becoming well educated itself and developing expertise in a certain field would count as successful, whilst others would say that getting a well-paid job and having a good career makes you successful.
The majority of university graduates struggle to find work here in the UK. That being said it depends on the courses you choose. There's a shortage of teachers, dentists etc. here so the people who study for those professions generally find good paying work straight from graduating. However most degrees in my eyes are not very useful in terms of progressing into a career in that direction.