Monday was certainly not one of his better days.
Generally, if he is not scoring you can 100% rely on his work rate but the Place game even he was off it with regards to that as well. On another day Richarlison and/or Calvert-Lewin would have slotted at least one of their chances.
Their is definitely a flaw in Calver-Lewins game and that is one on ones or less instinctive finishes, I don't necessarily see him as a player that will naturally glide past a keeper to put it into an empty net so something has to give, either he works very hard on that or makes a tweek to his game when in that clutch position.
What I do find is that some people are way too quick to give him dogs abuse, call him names and go over the top with the negativity. Us sane logical fans who see common sense (and are adults) have to live with that and simply try and debate the negatives along with the positives. There are no doubt positives to his game and I fail to see how anybody can not see that.
He is going through a rough patch at the moment, he seems like a lad who wants to make it work and will work hard at getting it right. Patience is the key as I honestly believe that he has all the attributes to get better.
Also, some fans seem to disregard tap ins as a skill and use that as a negative. Personally, I just don't understand how you can use the main objective and succeeding in achieving that objective as a negative.
Last note, specifically on the game. The keeper did extremely well for all his saves, credit has to go to him along with faulting Richarlison and Calvert-Lewin. Even in the build up to the goal he made a top class save from Sigurdsson.