GTM - Track all downloads except certain classes - triggers

Question

I currently have a trigger in GTM that tracks when certain documents are downloaded, such as pdfs, xlsx, png, docx, jpg... etc..
This is setup to track on the entire site, however I have a specific section that I don't want tracked by this catch all.
I've been trying to add an exception that says if a download link contains the class "Library_Download" then don't track it under the catch all trigger.
I'm trying to bring more clarity to what types of files are being downloaded.
I have tried adding exceptions to the tag, or adding validation to the trigger that and I seem to be missing something.
Catch All Trigger
Trigger Type: Click - Just Links
Trigger Fires On: Element URL Path - matches RegEx
\.(pdf|xlsx|png|docx|jpg|jpeg|zip|pat|dwg)$
How do I not count any link that contains the class "Library_Download" Or is there another way I should have them omitted?
I've created the following trigger and added it as an exception to the tag but it didn't work.
Trigger Type: Custom Event
Event name: \* (Enabled regex matching)
Trigger Fires on: Click Class - contains - "Library_booking"
Nov 21 Edit
So to clarify a bit more with HTML. Below is what I'm currently using for my library_download link. I'm currently only concerned with the pdfdownload.pdf
<div class="resource_row">
<div class="resource_item large <?php echo $post->post_name; ?>" data-filter-item data-filter-name="<?php echo $post->post_name; ?>">
<a href="www.librarywebsite.com/librarypage/" ><?php the_post_thumbnail('medium'); ?></a>
<p><?php the_title(); ?></p>
<ul class="resource_icons">
<li><img src="<?php bloginfo('stylesheet_directory'); ?>/img/icon-download.png" alt="Download PDF" /></li>
<li><img src="<?php bloginfo('stylesheet_directory'); ?>/img/icon-library.png" alt="library" /></li>
</ul>
</div>
</div>
This is how a regular link would look like (the only thing that's changed is I have removed the class Library_Download
<div class="resource_row">
<div class="resource_item large <?php echo $post->post_name; ?>" data-filter-item data-filter-name="<?php echo $post->post_name; ?>">
<a href="www.librarywebsite.com/librarypage/" ><?php the_post_thumbnail('medium'); ?></a>
<p><?php the_title(); ?></p>
<ul class="resource_icons">
<li><img src="<?php bloginfo('stylesheet_directory'); ?>/img/icon-download.png" alt="Download PDF" /></li>
<li><img src="<?php bloginfo('stylesheet_directory'); ?>/img/icon-library.png" alt="library" /></li>
</ul>
</div>
</div>
Like I've mentioned my catch all trigger currently get's triggered on every single PDF download, I just want to omit the links that have class "Library_download".

Answer 1

In my opinion you made a mistake in your regex in "Custom Event" exclusion rule (that's why this rule doesn't work). You have "\*" (with regex matching checked). Try to change regex to:
.*
This will match every event (and then of course preserve this: Trigger Fires on: Click Class - contains - "Library_booking").
In your case regex like this: "\*" will match only to event strictly named as "*" (star)