> Any tips on cutting out something completely and how to get out of just hating yourself when you fail?Be careful with cutting alcohol cold-turkey. Beyond a certain point it is very much a physical dependency, and as it affects the full nervous system (it passes through the blood/brain barrier quite easily) cutting it off directly can cause physical withdrawal symptoms starting with shakes and in extreme cases possibly even stroke. This is one of the reasons the rich check themselves into clinics for rehab: having medical staff around to monitor and manage any such reactions makes the process significantly safer.
At times I drank a lot. Vodka most nights, sometimes at least 250ml each night and often litres of the stuff over Fri/Sat/Sun. This was at its worse in the year or so before being diagnosed bipolar (turns out that I was self-medicating, which had worked for a while but hit a spiral that make things much worse). I cut down a fair amount after that, but was still a fairly heavy drinker.
Cut to a decade or so later, there were a number of close calls with regard to health (including a couple of heart issues) amongst friends and family, and with a history of heart issues in both sides of my family tree I decided to do something about my condition (knocking on for 18 stone, and hellish unfit). It helps that my social life had taken a turn for the better around then, and I'd decided this Dave fellow wasn't someone I didn't mind letting rot (my main pension plan to that point was to not live long enough to need a pension, hence my significant “investments” in alcohol).
As I started losing weight I deliberately cut back as alcohol==calories and sometimes it was a choice between drink and chocolate/icecream/ete, and part way through that process I started exercising partly to burn more calories (so I didn't need to cut back on consuming them as much) and partly to get what was left of me into a better shape. I discovered I enjoyed running (I'd have never guessed!) and set myself some goals. This was the point I really cut back as it sometimes became a choice of keeping to those goals or having more to drink. The fact I've reverted to eating and drinking more while recuperating over recent months (long covid, grumble grumble moan moan) might support the suggestion that I reduced those additions in favour of another!
I never cut it out completely, which might not work if what you have is a true addition rather than a dependency, or might if cutting out completely doesn't work for your social circumstances. I just don't drink often, though I can and do occasionally drink a lot in one day/night.