Ethereum was a "failure" for the better part of a year after it launched. EOS has been live 2 months. EOS could end up a failure. It needs more than 2 months before this is decided by the people who are going to launch serious EOS projects. The projects that launch in the end, determine whether it's a failure. Right now, people are still in the very early stages of figuring out the platform and whether they would even want to launch something on it.