Yes, there are days when I am heartbroken by the realities of DD's life, and other days when I am heartbroken by the realities of our lives because of DD.
There are days when I am so proud of her, watching her skills improve in things her ASD makes even harder. And seeing how her ASD means she's doing things I never did and loving them - like a sport she does at a high level, but we only got her doing it as a way to improve her social and communications skills. Go figure! But also her other skills, that you can see her working hard on, trying to fit in, and figuring things out and asking for loads of help in her own roundabout way (and lashing out in all kinds of stress you have to figure out what it is about) - and then she clicks with it, and she gets up the confidence, and she walks away doing something just the same as everyone else.
And you also stand back, and realise that you have learned so much yourself, about different kinds of love, empathy, calmness, management of paperwork, and being strategic in how you chase things and make things happen, and learned about doing things differently, and communication skills to engage with different people at different levels and talk in ways they will understand......and you are a little bit proud of yourself, for 2 seconds until the next meltdown head comes around the door....
But those little moments when, they may be very different milestones you are looking at, but they start to show progress in their own ways, can really help.
And interactions with school can be as much about how you are trying to work with them, so somedays they are positive and good results can be seen, but just like every other parent, there are some days when you are going in and calling them to account about how they are failing your DC. The reason why and the actual failure may be different to other parents, but every parent that I know has been into school about a failure of some sort or another by the time they leave primary school - perhaps less frequently, and more easily solveable, but they have still been there.