There's something about writing like this that gets at me. It's angry, for a good reason, it has lots of good points, but in trying to get across its main point, which is signaling dissatisfaction with the tech industry, attacks lots of groups, hits lots of unrelated points, and when it gets into historical tidbits overrates single events in order to build a narrative.
For example, please stop using terms like cishet. I know what that means. I know it is important to marginalized communities, but know your audience. There is nobody, nobody in today's environment that could get away with saying "a bunch of (blacks|indians|mexicans|asians|gays|women)" but you say cishet white guys and you can group up a whole lot of people without thinking much about them as individuals. Do you believe this is constructive language that bridges the divide that's part of these issues? Do you know where my abuelita was from just because you can see the color of my skin?
Second, I don't think the Slack example is really about inclusion. We all can be stalked and spammed, of course marginalized people more than others. However, Slack's slowness about this isn't nefarious, it's almost certainly they were making so much money recreating IRC that they didn't have time to worry about "minor" issues like that, the same way Hulu can ship a UI that works correctly on a phone but can't be bothered to fix bugs in the TV version that ships to 10 million people. It's not hatred or marginalization, it's just laziness and apathy, it's how our corporations work because they turn into these battlegrounds.
> Steve Jobs wasn’t some kind of genius visionary who independently thought that thing up.
Jobs was infamous about taking credit, but he never would have made claims like this. That product like all of his products at the time was built by a small team, guided by Steve, that bought up and used lots of existing ideas. There's a reason we like to quote "great artists steal". Hell, the Newton existed 10 years earlier and they had Tony Faddell from an even earlier time that tried similar tech. (Steve Jobs, Becoming Steve Jobs, General Magic)
Some of us are sympathetic to many of your points but outsiders don't only come in races or genders and the only way we get out of this collective stagnation is to stop tearing each other down with various narratives about what's wrong with them.