dont kids learn how to speak when theyre two years old? He was supposed to be speaking way before the incident

Sooo… am i the only one that thought this episode was wildly disapointing?
First of all, they just spent a season building mickey as a deep intresting character just to give us this disappointing preformance?
Sammys death was mostly random and even kind off parody-like. After everything weve been throw with her, its…