Yeah I made about the same in cashback, with the bonus of included phone insurance.
I liked being able to just put £500 in each month and leave it for the bills without worrying I’d spend it by mistake.
By trying to budget better, I need the money to come out of fewer accounts to improve my self control over spending. When I was separating money into different places, I was left with spending money that I would always use up. Personally I want to see a balance grow, not just have a bit left in an account and then spend it because it’s there.