Yes, it can be really, really hard to remove. (Depends on the variety.) And some varieties spread really fast.

@𝕕𝕚𝕒𝕟𝕖𝕒 🏳️‍⚧️🦋 - The stuff that was near our back fence in Van Nuys (Calif) started heading for the swimming pool. It was almost a question of "How fast can I run?" (The stuff could grow sideways underground nearly as fast as it could grow up towards the sun.)