Complex sentence: Estragon should not, however, be written off as merely a childish simpleton, for he can easily match Vladimir in verbal melee (he delivers the ultimate insult in calling Vladimir a "Critic!").
Split into simpler sentences: Estragon should not, however, be written off as merely a childish simpleton. He easily matches Vladimir in verbal melee (he delivers the ultimate insult in calling Vladimir a "Critic!").