Here are some more natural ways to express the same idea in Spanish:
* Tan aburrido como el infierno: This translates to "As boring as hell" and is a more common and natural way to express extreme boredom.
* Aburrido hasta la muerte: This means "Bored to death" and is another way to express the same sentiment.
* No puedo estar más aburrido: This translates to "I can't be more bored," and is a very direct way to express boredom.
Remember: While "La misma aburrido como el infierno" is technically correct, it's not a phrase you would typically hear spoken in everyday conversation.