Tell that to the pros winning millions of dollars. Don't see many kids there. It's a fun, addictive game to dip in and out of. You get all sorts of ages on there.
Fortnite's developers - Epic Games - are usually very good with their community, it might be worth getting in touch on Facebook or Twitter, you never know, they may let him transfer it to the new Season 4's Battle Pass.
Just got a Duos win with a mate - said mate is a lot better than me and practically carries me at points. Finally starting to get wins now and I can see the addiction starting to fade a bit. Fun game though.
That's not unusual to start off with - I probably had a similar record at first. Perhaps try landing in more obscure places for now so you can spend a bit more time getting used to the mechanics of the game.