Sounds like a skill issue. Just unhinge your jaw like a snake and eat it in one bite like normal.

This is why I always go for a soft taco instead. Hard tacos want to be salad and will detonate into corn-chip shrapnel the instant you take that first bite, unmercifully dumping its contents onto the table and your lap in the process. I can't imagine eating one mess-free, unless equipped with a jaw that unhinges and a supernaturally flexible neck.