The damage isn’t major, but it scuffed the inside of the handle whilst trying to install. You can’t see it under normal circumstances. But what is one supposed to do? You buy a product, in which there were instructions, being poor, on the page they were bought from. How is anyone to know about the process of removing a part to install another was required without saying so? Even if you came to that conclusion after the fact, you still have to go about figuring out why it’s not working before hand, therefore causing minor damage in the process.
But sure, it’s fine to look at this with all your hind sight, even the op had to partially translate Korean to find his method.
But no, blame me instead of the people responsible for telling us how the product they sell should be installed.