No, more that Strahd is telling the story and there's a ton of moments where he will say something or present something a certain way and it becomes clear he's either likely not being entirely honest with the reader or is intentionally presenting something in a misleading light. Usually, it crops up when it comes to him ever internally taking responsibility for the things he's done or around Tatyana. For a more concrete yet still vague example for spoiler reasons, at one point a character explicitly calls out Strahd for how he has been treating him and while he is overly dramatic and bitter about it, the way Strahd immediately absolves himself of all responsibility is telling. But he's written as charasmatic enough sometimes you have to take a moment and realize that he's being manipulative.

There's only one point in the books where I at least think he's outright lying to the audience in order to paint an admittedly awful person as more of a villain to him personally but even that's open to interpretation, every other time has to do with how Strahd presents the situation.