lol either amazing coincidence or someone really wants to piss you off
Anyway, nobody can advise you on this as it's up to you to decide whether you want to keep it or sell it.
Personally, I wouldn't mind keeping it, and I actually purchased domain names in the past that looked similar to domains that were already established at that time, and I didn't do this out of spite or with some secret marketing gimmick in mind, I did it simply because I liked those domain names. Yeah, it's not an ideal situation but given how all good .coms have been being hodl'd on for the last 20 years I think you should keep such a good name (because it is a good one IMO).
But again, you are the one who knows how pissed off you are about this situation so it's your call, but I don't think you can sell it for more than $20 anyway, so you might as well keep it