The poster was so large that no amount of tape would make it coherent to the wall?

The sheer size of the poster overwhelmed the wall, making it difficult to secure it properly with tape. No matter how much tape was used, the poster's dimensions created an awkward fit, leaving it sagging or peeling in places. It seemed that the wall simply couldn't accommodate such a grand display. Ultimately, the poster's intended impact was lost amid the struggle to attach it effectively.