Oh man this one had me laughing! I love the self examination and reflection of your first stanza. I also enjoy the fact that you're comfortable enough with your own style to write a piece like this. It's fun and ditsy :) failure is all in perspective and you got a good one by the looks of it.
I think that "flow" concept is a trick used by English teachers who haven't studied poetry but have to teach some. Beats me what it means.
"I failed but it's OK" is such a good thing to write about!
You can tell a real poet because sometimes they write a poem about writing poems!
abac gets boring, even though a ballad to sing has to have each stanza the same. But not for singing, in this 4-line format there is abab, abba, abca, abcb, yaddayadda available for more complicated structures. Well anyway, I find it boring when a simple rhyme-scheme is repeated simply. In songs, there is the refrain (chorus) to give needed variety; but in literary verse you got more options if you want them.