You could try a replacement extractor, they have widely varying specs and you may have gotten a bad one. But the ejection may be just as bad with the replacement.
For ejector tuning, try not to reduce the overall length of the ejector. You'd just want to reprofile the tip to have more of an upward face with a slight face to the right toward the ejection port. JBarbaresi did it successfully with a 336 9mm ejector. In all pictures the left is factory unaltered, the right is reprofiled.