How do I get the route name of a view page?
The correct routename for view is view.VIEW_MACHINE_NAME.PAGE_MACHINENAME(in another word "view.$view_id.$display_id" ) . try something like following 

use \Drupal\Core\Url;

$url = Url::fromRoute('view.VIEW_MACHINE_NAME.PAGE_MACHINENAME');
$form_state-&gt;setRedirectUrl($url);


and for your case

$url = Url::fromRoute('view.team.page_1'); // page_1 is my guess as to your page name, please replace it with your page machine_name


Lean more : How to formulate the route name

after @4k4 comment, Also you can redirect form to custom router with URL

just need use $form_state-&gt;setRedirectUrl($url)