Struggling to cope with the pressure of others at my job

I work as a youth handball coach and I like most parts of the job- planning, researching, coaching, competitions, most of the kids, but I struggle with the parents. Most of the parents are just on the background I rarely see them and they don't interfere or have suggestions or questions, some are really supportive and helpful, one or two give their opinions and stance way too much and inappropriately, but right now I seem to be struggling with the ones that are polite, but have some issues regarding their kid.
We opened a new group this season, girls aged 7-10 and the youngest of them is a great kid, also has okay skills, but she's bilingual and quite shy, doesn't speak national language too well and therefore hasn't really made friends in our group. With kids it is common that at first they prefer to pair up with their friends and toss the ball to friends during games. So this kid has come up to me a few times in practice crying because no one passes to her and today her dad called me about it and was polite about it and I agree that that's not great and I explained to him that it's usual in new groups for that to happen, but I have been talking to the kids and trying to adapt exercises and games so that kids would be kind of forced to include her too, but ofc it's not possible 100%. The dad ofc is looking out for his kid and I respect that, also he came at it politely, so really it's a totally normal situation for a coach, but these things seem to get stuck in my head and make me overthink and think about all the other things I could be doing wrong and so on.. I guess the reason I am writing this is just to get it out of my system and make myself think it through to understand it really is okay, uncomfortable, but a normal situation. I would just like someone to validate my thoughts and feelings about this.

You are an amazing coach for doing what you are trying to do. As that kid that always played alone and felt hurt when no one was on my team or picked me, the fact that you are trying to do things so she always gets included probably means more than you can imagine to her and her dad. Sometimes it is hard and you doubt yourself, but I do not think you should, you are an amazing coach

I think you are a good person having to deal with a problem of human nature, i.e. the tendency of children to exclude others.

It is, of course, not your fault, and I see where you are really trying to help this child and so is her father.

Children can be so cruel. I have bad memories of PE as a child and young teen because of this.

But my coaches never cared and acted like I disgusted them, you aren't doing this, and I admire you.

Reading this, I feel you've dealt well with this situation. Stepping up and handling it the way you have, is far more by many a mile than what any of my school PE teachers would've done. Mind you, that was back in the 80's which had quite the distinctive dynamic...

I get a sense from your post that you might be affected by this because you have a passion for your work and a strong sense of duty of care towards the kids under your charge. So when a situation like this happens, it can be a kind of reflex reaction to overthink things like the way you have been.

However, as what has already been alluded to - the other kids. Variables which are not exactly under your complete control. Now it could be seen as an easy out by commanding the rest of the kids in the group to pass to her. Problem there of course is the danger of developing resentment and further ostracisation. The approach you've taken by adapting the excerices and games is what I feel to be a more subtle and diplomatic route in handling this situation which to me anyway is the right thing to do.

I think you're doing a great job. Just caring and doing your best means a lot. There are really a lot of people who just go to their jobs for a paycheck and don't care about how their work effects anyone else, so caring really puts you head and shoulders above them.

I wonder if you could assign the pairing, or rotate the pairing so that it's more inclusive.