I know you say a lot of this is particularly relevant to your own situation but I think it is more relevant to other people than you may realise.
I once tried to write a fathers day poem and focussed on the way I couldn't remember the first moment we met, yet it would be one of his most vivid memories. I don't always get on with him. We're very different in our views and ideas. We argue. But, as you obviously know, you can't help but love your family. Even if you don't like them, you can't help but want them to be at those plays, wanting them to be proud of you.
'You reminded me that life
Is sometimes full of… crap'
maybe not the most eloquent or poetic but it's honest. It doesn't need to be all flowery and exaggerated. The simplicity of it is enough.
That is extremely sweet. I love my family more than anything in the world, so it really means a lot to me when I see other people appreciating their families. So many people (especially teenagers) disrespect or hate their parents. They don't realize that their parents are the best things that's happened to them.
I see a lot of inside and personal references in this poem. While I can't completely understand them, these points make this poem even more sentimental.
The only part I see that may need changing is the following:
"Those times when life was just too much,
And I hated mom, and she made me cuss"
Were you trying to rhyme? Or was it accidental? Also, using the phrase "she made me cuss" in this type of poem kind of disrupts the flow.