How to make exposed filters more readable in the URL?
There's no easy way to do that .. views better_exposed_filters is quite nice, but does not provide clean urls. Drupal 7 had query_parameters_to_url, for Drupal 8 they link to a sandbox! project ... This may be a starting point for you.
There may be a simpler approach here: Redirect based on query string using a redirect event subscriber:
&lt;?php
    static function getSubscribedEvents()
    {
        $events[KernelEvents::REQUEST][] = array('Redirect', 20);
        return $events;
    }

So you could provide at least clean urls to &quot;somewhere&quot;.