One of the worst things about today's media is the adaptation of anime or animation into live-action. Often times it's done very badly. Sadly, this is exactly the case with "Kimi ni Todoke".
One of the advantages of anime is that you can have settings, actions, and character expressions that can't really be replicated - or replicated well - in a live-action medium.
"From Me to You" suffers from this transition. The Kuronuma Sawako in the anime is a much more funny and creepy nuanced character than she is in the live-action version.
Kazehaya Shota was also better in the anime version. A lot of credit needs to go to the animators and the voice actors; their live-action counterparts could not replicate that level of excellence.
And that's ultimately the disappointment of "From Me to You". Teenage angst, awkwardness, and love was better done in the anime version. Works of art should be left alone.