The Detroit rapper was up to bat on the "Drink Champs" podcast, and during the sprawling interview -- Ye's remarks from about a month or so ago were brought up ... which BS did not shy away from in the slightest.

For starters, Sean says he was hurt by Kanye's words ... and took the very public shot personally -- this after thinking it was funny/absurd at first. He explains why, and it basically boils down to his loyalty and dedication to Ye's label G.O.O.D. Music ... and to Ye himself.

Check it out ... dude says he's been available to Kanye on the drop of a dime over their time together, and not just that ... but was apparently also the first one to suggest Kanye run for POTUS. Eventually, he pivots to money ... citing cash he says he's owed from Ye/G.O.O.D.

The amount Sean claims he's due ... around $6 mil or so, although he notes he's not sure if this is even on Kanye's radar. Still, he says that while he thought UMG was the one screwing him at first -- he says he finally learned G.O.O.D. Music was allegedly pocketing extra profits off the success of his many albums ... the most put out by any G.O.O.D. artist, he points out.

Sean also addresses Kanye's gripe about him and John Legend endorsing other candidates while Ye was running for President last year ... but BS denies he ever did so, saying he purposely stayed silent out of respect for Kanye.

There's a lot to unpack in the 3-plus hour-long interview ... but the takeaway here is, Sean was quite angry after hearing Ye trash him so publicly. He says Kanye actually reached out shortly thereafter to reconcile, but Sean says he shot him down.