Something that irritates me about people who are inclined to think rigorously about evidence is a tendency to lean a bit too hard on a high standard when it's convenient for them. They may even, quite often, dismiss all evidence as insufficiently strict, and then say there is no evidence at all. The criterion for calling something evidence is not that it is proof.
Why not simply say "There is no firm evidence, in my opinion, let alone proof"? This is more honest and accurate. It allows that others have cited what they believe is evidence and calls it into question without insisting that none of it can be real anywhere.
Evidence is suggestive. If you think it's evidence, call it a clue. Call it suggestive evidence to reinforce that it isn't proof.
Please don't call it "there's no evidence at all" just because you haven't been convinced by the so-called evidence you've seen, heard, or found.
When a claim is definitively disproven, the clues that hinted at it before, that were taken as evidence, are no longer evidence that the claim is true, but they remain evidence about how people think and perceive. In that sense, they are evidence *about* the claim rather than evidence *of* the claim. In hindsight, they become a different kind of evidence, but evidence they still are.