There's a NYC session musician named Tommy Mandel. He's been around forever and played with tons of people. He'd mostly be known as the guy playing the piano intro on Bryan Adams' "Everything I do I do it for you". Anyway, he's got a few screws loose, and his website definitely reflects that, but if you dig deep enough he's got some rambly so-called chapters of a book he's been writing forever that will never get finished about his interactions with famous people which includes this great interaction between Axl and Cobain:
One, axl was never fat while Kurt was still alive. Two, that’s a very slanted retelling of their feud. Allow me to add context
Early on, Axl liked Nirvana. He asked them to open for the Metallica/GnR tour. Kurt not only declined, he did some interviews going out of his way to call GnR the 90’s version of toxic
Kurt quotes:

After that, being completely snubbed by a lazy heroin addict, axl started referring to him as a junkie and repeated some rumors that Frances Bean Cobain was retarded/had birth defects.
Courtney’s totally helpful

commentary was a long form way of calling axl retarded while cuck shaming her useless junkie husband, which Kurt played off by pretending to be too cool but then because he was a passive aggressive hyper femme with shit taste in women (because they were beards and he shaved a lot), when kurt went on stage he spat on axl’s piano.
there’s no realistic way to take nirvana’s side. They acted identical to today’s blue hair Butch dykes
Here’s some more context. This argument happened backstage at the famous 1992 VMAs, where Axl performed November Rain with Elton John to appease the cancelists of the era and signal his willingness to tolerate homosexuals, ie the Jews were going to sue him if he didn’t, and I’m sure that degenerate lefty communist Kurt Cobain was insanely jealous already. Nirvana was at its absolute peak, which just wasn’t good enough

