難しすぎ
= It's (too) difficult.
働きすぎた
= He worked (too) (hard).
食べ過ぎた
= I ate (too) (much).
考えすぎる
= You think (too) (much).
彼に頼りすぎ
= You depend (too) (much) on him.
間違いをすることを恐れすぎ
= You are afraid of making mistakes.
too は どこに入る ?
You are too afraid of making mistakes.
ここ