Taylor vs Catterall, was it fair? Oscar Davis, Latymer

The super-lightweight champion was disputed on the night of the 26th in Glasgow Scotland. After much build-up the two fighters, Taylor and Catterall, clashed gloves; however the end split decision was a controversial one. 12 rounds led to the victory of Scotsman Josh Taylor and since emotions between the two camps have run high. But why was it controversial and how does this affect the future of corruption in boxing?