Since this is a journal focused on cancer and not machine learning, I can understand why the editors would see this paper as being worthy for for publication. Unfortunately, many of the readers will read the paper uncritically.
If possible, you should write a critical response to this paper, focusing on its methodological flaws, and send it to the editors. It doesn't have to be long; critical response are usually a couple pages at most. This is likely the most effective way of removing (or at the very least, heavily qualifying) bad science from research journals.
If possible, you should write a critical response to this paper, focusing on its methodological flaws, and send it to the editors. It doesn't have to be long; critical response are usually a couple pages at most. This is likely the most effective way of removing (or at the very least, heavily qualifying) bad science from research journals.