Name the 13 goals that were all his fault. Then name me every shocking miss we've had this season that also cost us points. Then try to remember the saves Howard made to win us points. You're looking at this from one side, and that side is deluded if you think Timmy was responsible for 13 goals against alone. He wasn't perfect this season. I was critical of him early on because he was poor. He picked it up and had a fine season. His numbers back that up. He's still a very good keeper, but I agree he needs competition.
I'm not going to name 13 goals because I'm not sure if it is that many/ I cba researching it but stop with this deflection with regards to chances missed. We are talking about Tim Howard here, in the Tim Howard thread. They are separate points and I'm sure you can bemoan missed chances in the Jelavic/ Anichebe/ Naismith threads...
As for saves made, I can't recall too many saves that have been top drawer that have saved us in matches. He has made a few, I know that, but not many that you wouldn't expect a Premier League keeper to make. I think if the 2 were compared then mistakes would outnumber the top saves.
Fair do's like, he's picked up his performances, especially after he came back from injury but overall I'd still consider his season a below par one, (along with Jelavic, Heitinga, Naismith, Osman before you feel the need to bring other players into the equation!)