Tbh, everyone at some point may or may not experience this.. it’s a defense mechanism we all have. It’s just about how you go about it. For some it’s more worst than others. I’ve talk to my friends ( I didn’t use the word depersonalization/derealization) but I said some symptoms but they’ve had it for a few minutes or they experience it only when drinking a lot or smoking weed and it goes away. I’ve talked to homeopathic drs and they’ve experience it but they just call it being ungrounded or brain fog.you just have to find ways to cope with your reality