I don't hate them, I think they've been excessively lazy lately with their titles and their products either don't interest me or make me question why others would want it as they're of little value comparatively to other things.
New Super Mario Bros was a neat call back on the DS, then they brought it to the Wii with extremely similar functions and with 3 characters that all use Marios animations. They literally admitted they were too lazy to animate Peaches dress so they didn't use her. Okay, fair enough...how many more New Mario Bros games have there been? They're all extremely same-y and STILL don't have Peach and the music is crazy similar to the DS game still.
Their All Stars celebration for Mario was also insulting as it only included a rom of All Stars, not even the version that came with Super Mario or you know including the Gameboy titles or Yoshis island. No, it was just a rom on a wii-disc for 50 bucks.
They're remaking Wind Waker...why? It's still an incredible looking game, and we all know cell shaded games don't really age poorly and you know it's going to be 50-60 bucks any way which is funny since the GCN version is ...what 20? Probably 10 if you find a solid deal? They're just choosing the easy option for a quick buck by making an easy port.
They ruined Metroid with Other M, I love metroid and there's no defending that pile of shit. It's bad in every department, gameplay, sound, visuals, designs, story, etc and only more insulting it tries to sneakly declare the Prime games (some of the best games of it's kind) non cannon. So, yeah I spent 50 on that and it was pretty much sold the next day after it was beaten.
I think the WiiU is interesting but given it's about even with current gen consoles it's not an investment I see myself or people I know getting. No, stop, do not quote me telling me it's more powerful because I'm going to tell you here, you're wrong. Okay it has higher specs, great! Except it has to have resources dedicated to encoding and streaming video to the controller and that takes a LOT OF POWER. That's why many live streams and lets plays usually have high end PCs or use capture cards to capture off a console. So there's that, the fact an update takes up 85% of the HDD space of the lower model and the upper model is bad even for 2006 standards, PS3 came with 80GB, well that just about says everything. There's no value in the console and playing New Mario Bros game isn't exactly a reason to jump up and buy it because you can easily get a near identical game on the Wii and EVERY game ported to it either runs worse or looks worse so again I'm not excited to purchase things for it.
I don't like the 3DS, I think 2 screens are pointless for gaming, the 3D physically hurts my eyes in a few seconds, I've not liked the games on it or there's a better version on another device. I'm sure it's fun but I didn't even really like my DS much, I preferred my GBA SP+ in every way.
I don't hate Nintendo, what I listed is just personal reasons why I don't have any interest in buying their devices or games. Seriously I have a GBA SP+, Gamecube, Wii, SNES, NES, and GBA is probably my favorite handheld. Why is it? Because it has a large number of great games and they're new/exclusive to the system or just nice to have portable versions.