embarrassingly
In a way that makes you feel ashamed or very awkward.
Embarrassingly means in a way that causes embarrassment or shame, often because something is awkward, inadequate, or reveals a weakness. When you perform embarrassingly badly at something, you do so poorly that you feel uncomfortable about it. If your room is embarrassingly messy when a friend comes over, it's so cluttered you wish they hadn't seen it.
The word often appears when someone notices their own shortcomings. A basketball player might shoot embarrassingly few free throws during a season. A student might realize they're embarrassingly behind on their reading. Sometimes it describes situations where the gap between what should be and what is feels painfully obvious: a wealthy country might have an embarrassingly high rate of childhood poverty, or a talented musician might give an embarrassingly weak performance.
Notice that embarrassingly doesn't always mean other people are judging you. Sometimes you're the only one who feels that way. What seems embarrassingly simple to you might not bother anyone else. The word captures that specific feeling when you're aware something doesn't measure up to expectations, whether those expectations come from yourself or others. It's the awareness itself that creates the embarrassment.