订购集合和关系集合laravel

I have the following laravel query

    $user = $this->user; //current user (dispatcher)

    //obtain list of dispatchers,trucks,deliveries,drivers,trailers
    $dispatchers = $this->instance->user()->where('active', 1)->with(['truck.delivery' => function($query) use ($week_array) {
                            $query->where('delivery_date', '>=', Carbon\Carbon::parse($week_array[1]['date'])->toDateTimeString())->whereNotNull('driver_id')
                            ->orderBy('delivery_date');
                        }])->with(['truck.trailer', 'truck.driver', 'truck.driver2', 'truck.trailer.trailerType'])->get()
                    ->sortBy('name')->sortBy(function ($item) use ($user) {
        return $item->id == $user->id ? 1 . $item->name : 2 . $item->name;
    });

My goal is to have CURRENT user to be the first item in the collection, and then, I want to have this collection ordered alphabetically by the user name.

In addition, this is where I am having a problem, I need to sort each user's drivers (a subset of a subset) alphabetically.

Sort level 1 for the whole collection: $user fist, and then by $dispatchers->name

Sort level 2 for each item in the collection: $dispatchers->truck->driver->first-name

I was able to create a sort for Level 1 (when current user is always comes on top), but I am unable to sort a collection for each user.

The final result should be like (users ordered and their trucks collections ordered by driver names in driver collection)

CURRENT USER (not matter the name)
 Truck 50
  Driver AA
 Truck 45
  Driver BB
 Truck 56
  Driver CC

USER A
 Truck 10
  Driver A
 Truck 6
  Driver B
 Truck 20
  Driver C

USER B
 Truck 2
  Driver D
 Truck 3
  Driver E
 Truck 1
  Driver F

USER C
 Truck 30
  Driver G
 Truck 35
  Driver H
 Truck 13
  Driver Z 

etc.

$user = $this->user; //current user (dispatcher)

//obtain list of dispatchers,trucks,deliveries,drivers,trailers
$dispatchers = $this->instance->user()->where('active', 1)
    ->with([
        'truck' => function ($query) {
            $query->select(['trucks.*']);
            $query->join('drivers', 'trucks.id', '=', 'drivers.truck_id');
            $query->oldest('drivers.name');
        },
        'truck.delivery' => function($query) use ($week_array) {
            $query
                ->where('delivery_date', '>=', Carbon\Carbon::parse($week_array[1]['date'])->toDateTimeString())
                ->whereNotNull('driver_id')
                ->orderBy('delivery_date');
    }])
    ->with(['truck.trailer', 'truck.driver', 'truck.driver2', 'truck.trailer.trailerType'])->get()
    ->sortBy('name')->sortBy(function ($item) use ($user) {
        return $item->id == $user->id ? 1 . $item->name : 2 . $item->name;
    });

It works for me, but not sure in your case.