The physicality and stylized realism running through Barry were completely undermined in this episode. Instead the episode switches genre from dark comedy to weird dark comedy. A genre I like, but a tricky one to pull off.
The backstory of Barry and Fuchs as (relatively) experienced assassin team is basically abandoned. They have no idea what they're doing all of a sudden.
Lathering the clumsiness on thicker, the writers throw in plausibility strainers left and right. Extras are treated like extras - as in paid background people, not actual real people who do stuff like walk down the street and notice things out of the ordinary - like bloody people.
Over and over the characters who we've come to know are chucked over for a sort-of stream of consciousness extended joke.
Sounds like it could actually be awesome, right? But it's not.