However I have reason to doubt your claim for it being almost unusable.
...or maybe if we compared it to my DSLR? Of how awful it is compared to that...
Our way of exaggerating problems and weaknesses (like your comparison to N900) will not do anyone any good. If we are to help, our criticism should be as neutral and as truthful as possible. Which is of course difficult for wretched beings like humans.
If we go that route, we can throw every single measurement and review published in any site out of window. MPC is so far the only site that has actually measured the screen and they were surprised themselves how good it was, except for being too dim, having not that great contrast and a bit biased white balance. My own experience does not contradict this, so I have no reason to doubt it. However I have reason to doubt your claim for it being almost unusable.