be out of one's depth

She was beginning to feel way out of her depth.

The child is out of his depth with such women.

But she was already out of her depth, in more ways than one!

The old man felt himself to be getting out of his depth.

Richard was beginning to feel a little out of his depth.

He began to feel even more out of his depth.

In so doing, however, they risk moving out of their depth.

The whole Council seemed to feel out of its depth.

She felt way out of her depth, a little lost.

I've met far too many who seem to be way out of their depth.