I mentioned in a top comment that is probably lost in the comments that I vouch for "if you're the smartest person in the room, find another room".

If you've got an suitably anonymous email address I can contact you on, I might be able to offer that other room. (Or you might think it's shite, which is fair).

But yeah, my current employer was my other room. Got to experience imposter syndrome again for the first time in a long while.