My Papa's Waltz Poem Analysis

The first time I read this poem I got the feeling that the speakers dad is an alcoholic based on the first 2 lines. Knowing that I got this pit in my stomach because my dad is an alcoholic aswell and I grew up with him always smelling like beer or rum. The second stanza I didn’t really understand so with a few more readings and dissecting it I should figure it out. However I did get that the dad is abusive towards the speaker based on the 3rd and final stanza. Overall I feel that this poem is strong and is meant to make readers feel bad and sympathy for the speaker and hate towards the father. Structure: The poem has a rhyme of ABAB CDCD etc, however most of them are slant rhymes so they don't necessarily have the same ending (ex; dizzy and easy). In addition the poem is also in iambic trimeter, meaning that there are 3 stressed syllables in each line which is in front of an unstressed syllable, but this is ironic because a waltz has three beats and the poem’s name is My Papa’s Waltz.
In lines 11-12 when it says “at every step you missed my right ear scraped a buckle” I think it means that the miss step made the speaker scrap against the dad’s belt buckle, which causes pain but the speaker is too afraid to speak up. The first real word that was directed towards violence was “beat” in line 13. In music classes most people say “keep” time and not “beat” time, but the poet intended this. Roethke used beat because like other words he used creates an undertone of violence to make the audience worried for the young