It's unsurprising that the internal narrative focused on the plausible user, product and technical issues which happen to align with sustaining the multi-billion dollar monopoly. Senior leadership isn't going to say the 'quiet part' out loud in all-hands meetings.
I also worked in a valley giant with a multi-billion dollar monopoly position being preserved in a similar way. But I was senior enough to see both sides - the divisional all-hands mtgs and (some of) the exec staff mtgs (my boss was an EVP reporting directly to the CEO). The instructive part was observing what happened in the senior staff mtgs when a serious user, product or technical issue emerged which directly conflicted with sustaining the multi-billion dollar monopoly. Even in small mtgs with just the CEO, a couple EVPs and a handful of their direct reports, I never witnessed any explicit collusion or overt manipulation. The reason is surprisingly simple, they don't need to. They can make "the right thing" happen without being so obvious - just by controlling the agenda, attendees and context and then asking the right questions, prioritizing certain concerns and selecting the right working group leader to "come back with options which balance these concerns". These EVPs didn't get to where they are by plainly speaking their mind, although they are masters of appearing to do so when it serves them. At that level, there are degrees of subtlety and multi-dimensional chess that make Machiavelli look like a toddler.
All those years of being "in the room where it happens" fairly frequently and there wasn't one moment where I thought, "Wow, if I leaked a tape recording of the last 60 seconds, somebody very important is losing their job." These people are far to experienced and skilled at this for it to be that simple. Which isn't to say there may not have been some very private conversations between only the CEO and an EVP or two where things were said explicitly - but I'm not even sure that was necessary. Frankly, the euphemistic language and context control is sufficient that it's probably easier for the them to "stay in character" all the time. In fact, I think some of them sort of believe it themselves - or at least prefer to avoid stewing on the more "unpleasant realities" of the job. Most of these people are, in their own minds, still the 'good guy' in the story they tell themselves.