Perplexingly

The language used in the legal document was perplexingly technical.

The code for the software was perplexingly complex.

The instructions on how to assemble the furniture were perplexingly convoluted.

The math problem that she was assigned was perplexingly difficult.

The recipe's instructions were perplexingly intricate, making it hard for me to cook.

The ending of the movie was perplexingly ambiguous.