How do delete single row in pivot table with laravel

I want to delete a single row of data in my pivot table. I don't get any error but when try to click on the button. It did not redirect me to anywhere so the delete function is not performed.

In the picture above I want to delete the highlighted id for user_id = 3 My scenario is that the user suddenly can't make it to even_id = 6 so the user wants to delete/unjoined the event.

route

Route::get('/user/event/{event}', 'HomeController@destroy')->name('user.event.destroy');

blade

@foreach ($events as $event)
    <tr>
       <td>{{$loop->index +1 }}</td>
       <td>{{$event->event_name}}</td>
       <td>{{$event->event_date}}</td>
       <td>
        <form method="POST" action="{{ route('user.event.destroy',$event)}}">
          @csrf 
          @method('DELETE')
           <a class="btn btn-danger">Unjoined!</a> 
         </form>
         </td>
    </tr>
@endforeach

controller

public function storeEventUser(Request $request)
    {
       $user = User::find(Auth::user()->id);
     //how I storing my pivot data (just to show if anyone asking)
      $user->events()->syncWithoutDetaching([$request->event_id]);
    }


 public function destroy($event)
    {
        $event= Event::findOrFail($event_id);
        $user->events()->detach($event);
        return redirect()->back()->with('success','Deleted.');
    }

Event model

 public function users()
    {
        return $this->belongsToMany(User::class,'event_user','event_id','user_id');
    }

user model

public function events()
    {
        return $this->belongsToMany(Event::class,'event_user','user_id','event_id');
    }

I am adjusting your controller method to use Route Model Binding for simplicity:

public function destroy(Event $event)
{
    Auth::user()->events()->detach($event);
    // or from the other side of the relationship
    // $event->users()->detach(Auth::user());

    return redirect()->back()->with('success', 'Deleted.');
}

As stated in the comments you need to adjust your route to Route::delete if you want to use the DELETE HTTP method that your form is spoofing via the @method('DELETE') blade directive.

Side note:

Auth::user() returns a User instance so you don't need to query for it again, in your storeEventUser method:

$user = Auth::user();