My biggest regret is going through KYC. Not that I have any issues coming from that as of today, but I wish I could go back and do things differently.
When I orange pill new people nowadays I give them long rants about the risks of KYC so they can be aware of them. I also assist them in using bisq/robosats/peach/lnp2pbot.
A few people I have orange pilled have never touched a CEX and only bought P2P. The went straight for the good deal and skipped the scars thanks to my rants. It makes me happy to see we as a community/society are slowly learning from our experiences and newcomers are able to avoid some of the mistakes we've made in the past.