If someone says "I'm never using Reddit again", they're probably just being dramatic and I don't think I believe them.
But if someone says, "I've signed up for a Lemmy instance and have set it up on all my devices and created convenient shortcuts and have found some interesting communities to read", that person has performed a greater act of defiance against Reddit than the first.
Personally, I haven't quit Reddit, but I've made sure to put a few other communities ahead of it in line. Many times I will reach my fill of social media before I ever get Reddit.