Matuidi isn't a holding midfielder. He has almost none of the characteristics (calmness on the ball, good decision making, passing ability) you want from a player playing in that position. You either use him as a box-to-box player making runs into the box or you don't use him at all. His best assets are running and his willingness to get back to defend. It's completely fine to not appreciate these kind of players (many nowadays don't). However that doesn't mean he is a bad player.