Bellini was accused of plagiarizing the music of his contemporary, Gioachino Rossini, in his opera 'Norma'.

Wagner and Hanslick had a long-standing feud, with Hanslick criticizing Wagner's music and Wagner attacking Hanslick in his writings.

Beethoven was accused of being a spy for the French during the Napoleonic Wars, but there is no evidence to support this claim.

Schoenberg's music was often criticized for its use of dissonance and chromaticism, which were considered to be too harsh and dissonant for traditional audiences.

Strauss was involved in a scandal involving his relationship with a married woman, Pauline de Ahna, which led to his resignation from his position as conductor of the Berlin Philharmonic Orchestra.

Strauss was accused of being a Nazi sympathizer due to his association with the Nazi regime and his acceptance of the position of President of the Reichsmusikkammer, the Nazi organization that controlled music in Germany.

Stockhausen was criticized for his use of electronic music in his compositions, which were considered to be too avant-garde and experimental for traditional audiences.

Stravinsky's opera 'The Rite of Spring' caused a riot at its premiere in 1913 due to its dissonant music and unconventional choreography.

Shostakovich was accused of being a communist sympathizer due to his association with the Soviet regime and his compositions, which were often seen as promoting communist ideals.

Cage was criticized for his use of aleatoric music, which involves elements of chance and indeterminacy, in his compositions, which were considered to be too experimental and avant-garde for traditional audiences.

Berg's opera 'Wozzeck' caused a scandal at its premiere in 1925 due to its dissonant music and expressionist style.

Handel was accused of plagiarizing the music of other composers, including Johann Sebastian Bach and Alessandro Scarlatti.

Schoenberg was criticized for his use of atonality, which involves the absence of a tonal center, in his compositions, which were considered to be too dissonant and avant-garde for traditional audiences.

Strauss's opera 'Salome' caused a scandal at its premiere in 1905 due to its erotic content and its depiction of the biblical story of Salome.