Wehby was a TERRIBLE candidate, worst Republican candidate of the year probably, that she is also a RINO is a separate factor. There are plenty of conservatives (and SO CALLED conservatives) who are also terrible candidates. Most of them, like Wehby, are political neophytes with no idea what they are doing.
Jeff Bell is a conservative, not sure why he is listed with Wehby and McFadden.
Also, these are 3 non-Republican states, Oregon and New Jersey especially. While I think Jason Conger (OR) and Julianne Ortman (MN) would have done better than Wehby and McFadden, it’s unlikely either would have won.