I think the first place I stopped using was Amazon way back in COVID times or earlier! I don’t think there was any specific thing they did, there just wasn’t anything they had that eBay, Onbuy or Argos didn’t have, and I don’t like to support monopolies if I can avoid it.
A few years later came Xitter. I sort of got peer-pressured into getting Twitter back in the day, I used it as an art dump, and didn’t really feel any personal connection to it, so I didn’t really feel bad about deleting it the exact day Musk bought it.
In the last year or so I’ve started to get serious about alternative tech. After working with Linux for about two years, I finally installed Ubuntu when Windows 10 became end of life last year, I deleted Instagram, I deleted Facebook, I deleted Reddit, and I deleted Whatsapp all within a couple of months of each other! The main thing I can’t seem to shake is YouTube, but even that’s been significantly cut down in favour of watching Peertube and my DVD collection!