Change '/user(/*)' URLs to 'profile(/*)'
The routes you've defined are new routes with different names and this is the reason the standard routes are still in place. If you want to override the standard routes you would have to use the same route names like user.page:.

But this is not the best approach to alter multiple routes. Better use a route subscriber:

src/EventSubscriber/RouteSubscriber.php

&lt;?php

namespace Drupal\mymodule\EventSubscriber;

use Drupal\Core\Routing\RouteSubscriberBase;
use Drupal\Core\Routing\RoutingEvents;
use Symfony\Component\Routing\RouteCollection;

class RouteSubscriber extends RouteSubscriberBase {

  protected function alterRoutes(RouteCollection $collection) {
    foreach ($collection-&gt;all() as $route) {
      if (strpos($route-&gt;getPath(), '/user') === 0) {
        $route-&gt;setPath(preg_replace('/^\/user/', '/profile', $route-&gt;getPath()));
      }
    }
  }


  public static function getSubscribedEvents() {
    $events = parent::getSubscribedEvents();

    $events[RoutingEvents::ALTER] = array('onAlterRoutes', -250);

    return $events;
  }

}


mymodule.services.yml

services:
  mymodule.route_subscriber:
    class: Drupal\mymodule\EventSubscriber\RouteSubscriber
    tags:
      - { name: event_subscriber }