Often a mistake made by newer writers, head hopping is one of the most frustrating things to encounter as a reader. Its definition is simple--when the narrator switches between one character's point of view to another without preamble or a signal to the reader about the change.
There are multiple ways to distance the reader, but the biggest culprits are filter verbs. The next biggest culprit is a lack of connection to the main character. And the third can be POV. Let's knock these down one-by-one.
In the second half of 2016, I focused on my writing and craft more than anything else and ever before. The book I wrote from earlier that year was a mess of epic proportions, and even then, I submitted that clusterfuck of a novel to #PitchWars 2016 and subsequently to an editor to help me realize what the fuck was wrong with it. Spoiler alert: it was pacing, which honestly boils down to structure.