No it's not. Sometimes (or maybe most of the time) doing it badly means maybe it's not your thing.
I used to have a neighbour who liked to play the piano and sing. He was doing it consistently badly and he didn't have anyone to tell him that he should probably stop trying.
I have two problems with that. One is, you can do what you like quietly and without disturbing anyone around you. Second is the Dunning Kruger effect: witnessing it first hand is never fun.
Who are you, to define what "the thing" is, for someone else?
Doing the thing isn't about judging other people. That doesn't contribute to your thing.
If someone is bothering you, making it hard to do your thing, then your thing involves talking to them about your problem. Without judging what they are doing.
Oh.. So you start doing something new and you're top 10% without practicing or being bad at it first? I'd love to test that to see if it's the case... Your logic is "You're not the best ever to do something so you are not doing it" means you have probably never done a single thing your entire life. Maybe you should just stop.
No it's not. Sometimes (or maybe most of the time) doing it badly means maybe it's not your thing.
I used to have a neighbour who liked to play the piano and sing. He was doing it consistently badly and he didn't have anyone to tell him that he should probably stop trying.