If it makes you feel better, people have been analyzing the ending since 1950

I took it as that Winston was just a man. Albeit somewhat above the average man, as many of us believe ourselves to be. Despite this, and the assistance of others, he still was utterly defeated. His mind, like many others, was broken and remade to serve the Party. They could have easily just killed him and disposed of him, but the Party chose something much more sinister. They destroyed him as an independent man. Those who may have had any thought that was not in line with the Party now has Winston as an example. Whatever you believed, you have always loved Big Brother too.