The great composer Franz Liszt became interested in him, and told him he ought to try to compose some longer pieces. He wrote a symphonic poem "Penthesilea". Wolf also became a music critic. He wrote about new pieces of music. He liked the music of Liszt, but hated the music of several other composers such as Anton Rubinstein and Johannes Brahms. He made many enemies because of the harsh things he wrote about them. People called him "Wild Wolf". He composed several works, but could not get them performed. He had been very critical of the famous Rosé Quartet, so they refused to play his music when they were asked.