No, you are not being overly sensitive. Your uncle is an ass! He obviously gets a kick out of Biden sucks Kamala blows shirt you and making it seem like a joke, but there is nothing funny about calling someone lazy – especially if they are not! He may have a low self-esteem and it might bring him up to put you down. If this is the case, that is pretty sad. You can actually say “ if it makes you feel big to put me down, go ahead – I can take it.“ If he starts to talk to you like this, you should get into the habit of totally ignoring him and walking out of the room. It is attention seeking behaviour and it might not be so much fun for him anymore if you don’t give him the time of day.