Here are some key factors that led to the breakup of Oasis:
1. Creative Differences: The Gallagher brothers had significantly different musical and songwriting visions. As the primary songwriters for the band, their conflicting styles and songwriting approaches created creative friction and tension within the band.
2. Personal Disputes: The relationship between Liam and Noel Gallagher deteriorated over the years due to ongoing personality clashes and personal disagreements. Their conflicts often played out publicly, and their strained relationship negatively affected the band's cohesion and morale.
3. Drug Use: Substance abuse, particularly alcohol and recreational drug use, became problematic within the band. Substance-related incidents, such as altercations and disruptions, further strained relationships among the band members and impacted their performances.
4. Departure of Key Members: The departure of original bassist Paul "Guigsy" McGuigan in 2009 further disrupted the band's stability and caused uncertainty among the remaining members. Other lineup changes also contributed to the band's instability and shifting dynamics.
5. Lack of Motivation and Inspiration: After years of success and popularity, the band began to lose its sense of motivation and creative inspiration. The diminishing passion for the music contributed to the overall decline in the band's performance and artistic direction.
6. Media Attention and Controversy: Oasis was constantly in the spotlight, and the media's attention and scrutiny took a toll on the band members. The continuous focus on their personal lives, controversies, and conflicts intensified the pressure and stress within the band.
In August 2009, after a violent backstage altercation between Noel and Liam Gallagher on the eve of their scheduled performance at the V Festival in Chelmsford, England, Noel announced his departure from the band, leading to the official disbandment of Oasis.