I don't think Purism is malicious, I just think they are just not sufficiently competent. There is just too much "fake it till you make it". I think they have had
some very competent employees over the past few years, who joined due to the mission, and later left for various reasons (and they may still have a couple). But the management is not sufficiently competent with the technology. They see the need for marketing to keep the company alive, but they just don't know what claims or plans they can reasonably make.
I was a backer of the original Librem 13. I can list lots of little details which individually should be forgiven for a company like this, but together are just ridiculous. It seems like every little thing was botched at least a little. Here's a really trivial one: in the initial news posts (before anything was shipped) it was written that the touchpad driver would be licensed gplv3 and submitted upstream. I sent an email "hey, you probably want to correct that typo (should be gplv2, or maybe gplv2+, obviously)" and the response was "we will consult with the FSF". Sure, consult with the FSF in general on the project, but who could be involved in this company, announcing details like this, and not know the license of the linux kernel? On its own that is nothing, but there is so much more. When I received the laptop, it came with slightly customized debian testing, and a broken apt/sources.list so updates did not work. I can fix that, of course. But they didn't have any working repo for a couple months, back then. (Which I only really needed for the kernel builds with the rather crappy touchpad driver. Later models switched to a different touchpad, and I suspect use no drivers that required any development work.) They hired the guy who did the majority of the coreboot customization and fixing needed, after I received the laptop, like 2 years after the project started. He no longer works there. And there's more.
I haven't been following the phone project closely. I can imagine that some (many?) supporters are very familiar with these technologies and issues, and when they read the news and claims from this project, they translate it internally to what it really means, given what is plain impossible and what is very unlikely. But still, it is ridiculous, and a bit embarrassing, for others who support free software and open hardware.