The issue isn't the graphs, it's the constant lies.
If they had just said from the start that "next update in 2 to 3 years" people would have grumbled at first then accepted it and moved on or sat and waited. But the devs knew that if they had been honest from the start a lot of people would have canceled their sub so instead they string people along with a constant "just two more weeks!" and now nobody believes anything they say anymore.
The chart is just a visual representation of the real problem, the dishonesty.
Yeah, well, except they never said anything like "just two more weeks!", quite the opposite. They never knew this update was going to take them this long, but they did inform back in October 2022 they'd be working slower and, since then, they have been constantly shutting down people's expectations about the update being close to be released. Many months ago it became obvious that the progress tracker was just a way to let people know they were still working on it, as it was no longer useful as a tool to predict when they update would be released -and that's devs' fault, of course, as a result of their poor planning and even poorer performance during this period due to a number of reasons, which is something they have publicly admitted several times, including this very same week.
Actual patrons did actually understand all of this and they've been acting accordingly, staying or leaving as they saw fit. It's only trolls and bad informed people in this forum who keep insisting in false claims like yours.