I never heard accusations that Chappelle stole jokes from Patrice, but Amy Schumer did. Her "Houdini" joke from one of her specials was 100% a Patrice joke, which he told when Amy was in studio. Patrice didn't necessarily talk about black celebrities being gay, but he did talk a lot about how Hollywood would make black celebrities do gay shit as a power move. If I recall correctly, the example Patrice used was how Tracy Morgan told a joke about beating up his son if he came out as gay, followed by Tracy Morgan having to wear a tutu and do some faggy shit on SNL or some other show.
He talked a fair bit about how gay black dudes were on the "down low" and would never, ever discuss it.
Chappelle and Patrice had a fair bit of parelle thinking but they're both black comics who did not want to get chewed up and spit out by the system so it makes a fair bit of sense. On top of that, they largely hung around the same crowd (to a point where Patrice and the Cellar Crew were in a few episodes of Chappelle Show).
What Patrice described then is now what we call the "humiliation ritual" and isn't limited to just black people, but it's a very hollywood way of controlling people. The most recent one being Sydney Sweeney. Tracy Morgan (at the time) got dragged for being homophobic during small scale comedy show by suggesting that,
how dare he, "Gay kids are normal kids influenced by the media and should be bullied" as well as "if my son says he's gay I'm going to pull out a knife and stab him" and not only did they force him into the usual apology tour -
they flew him out to the club again and made him personally apologize to anyone who was offended and then make an apology speech inf ront of a GLAAD audience. Pretty clearly they told him the tens of millions of dollars he was making from 30 Rock, SNL, and other projects would be slammed to a halt if he didn't and he capitulaized, even though as Patrice puts it - "Tracy Morgan is from the hood".
Patrice didn't want to have a "price" where he could be made to do something like that, even if he was getting tens of millions of dollars to do it. All of his comic friends clearly had a price - from Norton essentially stabbing Dice in the back (and then Opie, and then Anthony), to O&A having to deal with everything forced on them to management (Opie's famous interview with Oprah) into dealing with the non-compete that sank their career, going on to Opie doing a show with Jimmy even though it was a disastrous idea. Bob Kelly crying on reality TV, that absolute cardboard cutout corporate friendly version of Bill Burr, and so on.
He loved when Charlie Sheen went off script and said "Fuck Hollywood", and when Chappelle did it too - but it never works out in the long run. He was happy being as successful as he was just because he never had to answer to anyone - even though he died an obese mess of a man dealing with his "girlfriend" and her kid, who always seemed like she was way more trouble then she could possibly be worth.