Is Look Back in Anger a rage against a frustrating society?

In a stylistic manner, yes. The play Look Back
in Anger , by John Osborne, attempts to break free from the former generation
of playwrights prior to the 1950's. During that era, playwrights had a tendency to
create what is known as "drawing room comedies". These were works that were meant for
mere entertainment and featured characters that were superficial, and whose only purpose
was to make the audience laugh with their
wittiness.

Osborne, however, belonged to a group of
playwrights who wanted to offer their version of the reality of a socially unfair
society and its effects in the modern man. His style wanted to bring out what was really
going on in England at the time without sugar-coating it, to put it in more simplistic
terms. After all, Osborne himself was quite unhappy with his own life by the time the
play was written. Look Back in Anger is basically Osborne's venting
spell at the oppressive life he was leading at the time.