why can’t I ever take a compliment (rhetorical)

yesterday someone said I was ‘the anchor’ at work. I said ‘thank you for saying that’ while trying to sound like I meant it, but really I wanted to rip her face off.

for whatever reason when someone compliments me, I think they have some ulterior motive. Or I brush it off as ‘they’re just being polite.” Which they are! But why