He had a Mick Jagger look when he was young. It probably helped his career. It would have been harder for him to become a celebrity in another era.

McDowell makes this movie. His ‘droogan’ sidekicks, for example, are lame, whiney 1-dimensional characters. Dim, for being the token blockhead dolt, comes closest to emoting anything interesting.
I find it odd that people find the violence so objectionable. By today’s standards, it’s not very graphic. At least not the way we get so much blood and gore in some action flicks in our era. I found the rape scene difficult, mostly because of the outrageous musical performance by McDowell which seems to render such violence seemingly that much more egregious by making it trite and jovial.
I think that the plot actually seems to explore violence and aggression as a psychological topic. I think that is why it doesn’t bother me like it does some, who probably think the violence is being celebrated. It also transitions to debating the topic on a sociological and political level when it is questioned whether the ‘therapy’ is either moral or effective.