My kid is in a similar situation with his coach where he feels undervalued. However, he still gets his ABs in, he still gets his time in the field, and he still mostly enjoys his teammates. So, I ask him what his problem is, and he just seems to want everybody to like him (just the way he is). Frankly, I tell him that he needs to grow a pair and get over it.
Another thing to note is that my kid is a little bit OCD. That aspect helps him in baseball and academics as he will work on things tirelessly to improve them. However, in these situations, he needs to learn to control what he can control.