Yes, it's anecdotal. But the thing is, that's a completely irrelevant descriptor in context.
Anecdotes can be bad evidence for a couple of reasons. One is that they can be wrong. But any presented evidence could be wrong, that's not peculiar to anecdotes, and in such cases, the problem is that it's wrong. Descriptors such as "unreliable" or "biased" are relevant in this context, but "anecdotal" doesn't adequately describe the possibility of the testimony being false.
The second common reason to not rely on anecdotes, and usually the relevant reason in terms of skepticism, is because even when true, they may not be representative. If you were picked on by a redhead, that doesn't prove that redheads are bullies. It's a form of sampling error. But that's not relevant either, because in a trial, it doesn't matter whether the events in question are representative. It only matters what happened in this one event, and a single event is always representative of itself.
So while it's technically true that eyewitness testimony in court is anecdotal, when that testimony is about the event in question (rather than, say, a character witness), then "anecdotal" is just completely irrelevant. It's not wrong to describe it as such, but it's pointless to do so. It adds nothing of any value. It's just a distraction.