I think Neymar always pressed relatively well , for example Bruno probably has one of the highest press averages in the league but there is no chance in hell I would describe United as a team who utilized a high press.
Di Maria was probably similar.
Kind of but your original point was that;
Where you made the comparison between Messi/ Ronaldo's pressing stats and everything has kind of spiraled from there.
At the end of the day I feel that while Messi is not one of the best pressing forwards (under average) in world football I don't think I would call him the worst or near the worst.
The site you linked own reference ;