Suppose that a police report says that a driver was at fault for a car accident but in fact the driver wasn't. Is the driver screwed if the driver takes it to court, or does the driver still have a hope of proving it wasn't that person's fault?
Most states have a per se bar on the admission of a traffic offense resolution in a case seeking personal injuries from a traffic accident, in order to discourage overlitigation of traffic offenses due to collateral consequences which they could otherwise have.
The police report is also usually hearsay, and so only the live testimony of the officers would be admitted.
Normally, fault in a traffic accident is not something upon which expert testimony is permitted as the decision is vested in the finder of fact (usually a jury in the U.S., but sometimes a judge in a bench trial).
Police reports are generally considered inadmissible in court when they address things juries are competent to assess on their own. Most police reports regarding car accidents are inadmissible in court because they are inadmissible hearsay when the accident is not personally witnessed by police.
The police report, in your case, is likely inadmissible in court, since most accidents are not witnessed by police.