What do you mean "we keep falling for it"? I remember after the acquisition there were tons of projects that left for Gitlab or other forges on principle of boycotting Microsoft. And for the many who stayed on Github, we still got about 6 years of pretty great free services before reliability really started to decline.

And its not like Github's load stayed linear over the last 8 years since the acquisition. Repo creation and pushes went exponential about 2 years ago with the AI boom, so even with fantastic execution I think they'd still be struggling hosting the ever expanding archive of all code in the world.