There are some functions on this page...

https://wpreviewslider.userecho.com/knowledge-bases/2/articles/1334-access-total-and-averages-with-shortcode-or-function

I fixed Airbnb download last night. It should now grab the avatars. You will need to remove the reviews and re-download.

The latest version of the plugin 12.4.4 will hide the images on the front end if they are broken links. The issue is that Google has started expiring the images after a while. I plan on saving them locally in the next version of the plugin as a work around.

That would be some of the site CSS overwriting the plugin. You can right-click on the arrow and inspect. Then look for the CSS. Then you can know what CSS you can add to the custom CSS section of the review template to fix. I can check it if you post the URL.

Can you post the URL?

Once you get the agents setup you can turn on Auto Download so you don't have to keep them updated manually. Yes, it would be time consuming to do it the first time.

Alternatively there is a way to use the google place api to set up a directory style site. Look under the Tools page of the plugin.

I only see one example. did you mean to upload another?

Re-importing the spreadsheet isn't going to work as it will skip any review that it finds in the review list already. You could perhaps delete all of them and then re-import, but that could risky. You could try on just a couple first. The best way to add a lot of tags are once is with the Bulk Edit button on the Review List page. It will add tags to all reviews currently filtered. 

I think I have this fixed in the Beta version 12.4.2 of the plugin. Can you give it a try? Just go to the Account page inside the plugin and check the "Join the Beta program" check box. Then the beta version should show up on the Updates page in WordPress. After you install the update. Deactivate and re-activate the plugin. That should force all the database table to update.

Are they showing as broken in the Review List?