In defense of HellAQA (barring the comment about the art style), the sheer, overwhelming amount of Touhou content and the relative lack of useful, easy to find and access English resources for the series (Wikipedia's pages on the franchise are extremely long and dry; basically, if you don't have a requisite level of experience with the series already, everything Wikipedia has to tell you will go in one eye and out the other, so to speak) makes the series seem nigh-inaccessible to those that aren't already fans, especially in the west.
There are too many possible starting places in too many different mediums, the fans are all already so deep they can't relate to newbs or casuals, there's a million characters and somehow all of them are important, and so on. None of these things are necessarily true, but it can certainly seem that way from the outside, which makes it incredibly daunting to try and break into the series.
And again, there's so much Touhou content that when you aren't interested, it can be very frustrating to have it presented to you constantly when you're not looking for it.