To what extent was the involvement of Winston Churchill during the invasion of Gallipoli ultimately responsible for its failure?

Description

The starting point for this discussion is the First World War, or in early 1915 to be more precise. Whilst the trenches were being dug in Western Europe, Winston Churchill had an idea: attack the weakest opponent, the Ottoman Empire, in order to separate it from Germany and to establish a link with the Russian allies. As First Lord of Admiralty, Churchill argued that the Royal Navy had enough power to successfully execute the plan whilst retaining the ability to destroy the German Navy and maintain its blockade.