Evolution is proposed as a fact, and contains many verified facts.
However there is a big problem with natural selection theory, in that it uses emotive terminology, which is really more suitable for matters of opinion. Differential reproductive "succes", "beneficial"mutations, which provide an "advantage". Most professional biologists are confused by the terminology of natural selection theory, which is shown by their opposition to creationism, but also in other ways, that they have no clear understanding where the line is between fact and opinion. That line is between what chooses and what is chosen, the first is a matter of opinion, the second a matter of fact. When biologists propose that organisms "like" to survive, as fact, then either this is false social darwinism, or we have to interpret it metaphorically. Like or dislike is properly a matter of opinion, and is properly no part of any science.
Aside from that many proposed facts in evolution theory may be false. And I think the timeline is generally false. Also the scientific merit of evolution theory is exaggerated, the theory does not describe origins, only creationism can describe origins. And organisms are chosen in the DNA world, as a whole.
A fact is obtained by evidence forcing to a model of what is evidenced. Facts are always about chosen things. The rules for obtaining a fact are totally different from the rules for arriving at an opinion.
Validating subjectivity is something you do before you can begin to do science. A social-darwinist is the anti-thesis of a scientist IMO.