Understanding 'Disillusioned' in Context

In the early 20th century, many artists found themselves disillusioned with traditional forms of representation. In response, they embraced abstraction, seeking to convey emotions and ideas without the constraints of realistic depiction. This movement was characterized by a departure from familiar forms, allowing for a wider exploration of color, shape, and texture. Abstraction became a hallmark of modern art, signifying a transformative period in artistic expression.

In this context, the word "disillusioned" most nearly means: