How old is to old for animal crossing

I'm a 32yo male and I finally saved up to get a switch so I got the oled and new horizons also metroid dread I was wondering how old is to old to play new horizons since I got it my brother hasn't stopped taking the piss out of me for in his words buying a game for young children I told him to f**k off and let me play what I wanna play but he's adamant he is right is he?