The number one problem are royalties. As long as the competitors are giving discouts to third parties blockbusters and Nintendo isn't, they're not going to put out the blockbusters.
However, I've never heard anyone saying DS had bad third party support, and neither did Wii, even if it didn't get the blockbusters, so if there is a problem with third parties, it's got to be somewhere else than Nintendo.
Also, Nintendo was the one that made Japanese publishers like Capcom and Konami big in the US market in the 80's and 90's, so I'd say there's a source for dislike, as the US publishers now had a new competition in sight eating their bread.
Ei Kiinasti.
Eikä Japanisti.
Vaan pannaan jalalla koreasti.
Nintendo games sell only on Nintendo system.
