To place a view block next to each comment use the module:
EVA: Entity Views Attachment
Create a new View for
user, add an EVA display, connect it in ENTITY CONTENT SETTINGS to the Entity Type
comment, the Bundle
default comment and as Arguments provide the token for the user id
[comment:author:uid]. Add a contextual filter for the User ID.
Now the EVA views block appears in the Comment Type and you can place it in Manage Display.
You can also use as Argument the comment id and connect it to the View you have in the question which is based on comments and has the author as relationship.