Why were the new weapons not very effective in ending trench warfare?

New weapons during World War I, such as tanks and poison gas, were often limited by the entrenched nature of warfare, which favored defensive positions. The muddy, fortified trenches made it difficult for these innovations to achieve their intended impact. Additionally, many new technologies were unreliable or not fully developed, leading to mixed results on the battlefield. As a result, despite advancements, the stalemate of trench warfare persisted.