Complex sentence: However, in 2014 they abandoned the "guerrilla gig" formula because of the majority of a large audience only a small part of it can totally enjoy the show, the rest can't see the band and can't hear the music well.
Split into simpler sentences: However, in 2014 they abandoned the "guerrilla gig" formula because of the majority of a large audience only a small part of it can totally enjoy the show. The rest of the audience can't see the band and can't hear the music well.