Could you maybe give more examples of what goals can be defined with "negative" selection as per your suggestion?

please see #6580

some more "anti goal" examples:

• 404-page visit
• failed attempts to log in
• failed attempts to sign up (p.e. by entering wrong CaptchaCode)
• failure to complete a multi-step procedure (filling a survey, uploading content)

As the last example indicates, some "failures" are not bound to visiting a certain page,
but to following a trail of steps that are meant to end in a certain action/pagevisit.
This is somewhat similar to the idea of the shoping carts "abandoned cart" tracking.

It would be awesome if this kind of two-step tracking would be possible for "failures",
basicly by first raising a flag on "user has started something" (p.e. on survey page 1) and comparing that metric with "user has ended process as expected" (= survey finished).
It should be possible to do this with custom events and subtracting metric A from metric B at this point, but to offer it as a feature seems a good idea.
Everybody likes to know how many people got lost, confused or distracted on the way to reaching a goal, and there is many more goals than "only" ecommerce.

As most helpfull I could imagine different user configurable goal counters for the dashboard instead of a single one. I would like to e.g. compare sales/registration events to unsubscibe/return events at a glace on the dashboard.

+1

It would be very usefull to have a graphical evidence (a specific icon) inside the Visit Log page for some "negative event", like problems during the contact form sending.

Can't it be covered by (maybe with manual HTTP requests): https://plugins.matomo.org/CrashAnalytics