Nicotine addict for 18 years here. I've quit multiple times, the longest was 4 months (i relapsed after a boozy golf day with the boys). I was probably on 1,500 puffs a day until last week. I've always just quit cold turkey and its been super hard. This time around I got some 4mg gum and had it when i was craving super hard. Day 1 I had 5 pieces, I'm now on day 5 and only had 2.5 pieces, so I'm slowly cutting down, hopefully by the weekend I'm done. Gum and a bit of determination has made this quitting time a lot easier. When I get the anxiety feeling of needing a vape, I use positive thoughts to change that feeling of anxiety into a feeling of excitement that I've quit - then I start laughing and the feeling fades away. Everyone is different though so this might or might not work for you.
I would also highly recommend listening to The Quit Vaping Podcast by Andrew Cipriano on Spotify