Saying "I'm bad with keys" has to be such a low expectation of one self I can't even comprehend. Like those people who say "I'm bad with maths", but even worse.
What I did used to do was be careless in tossing them somewhere random when I came back into the house when I did take them. I now have a keyhook by the door I consistently use. But, sure, be condescending. I'm sure it will serve you well.
My system is, if I'm outside the house my keys and wallet are ALWAYS with me, doesn't matter whether I think I'll need them. I'm 40, I don't think I've ever misplaced my keys. Can't swear, but I really don't remember a single instance.
It's easy to fall into being condescending when all I see around me is people struggling with basic stuff. I get the impression "huh I must be a genius or something, I'm the only one that can do keys". I mean just look at the sibling comments "put keys in jacket", "what if it's too hot for a jacket urr durr". It's really astonishing.