Woah woah woah! Granted, the more recent titles in their ips haven't exactly been great (looking at you, skyward sword), but c'mon, saying that nintendo is bad at making games? This is completely unjustifiable. Ocarina of time? ALttP? Super Metroid?
Having an opinion is one thing. Perhaps YOU don't personally enjoy nintendo's games, but you really can't deny that the above titles are very well made (with the exception of skyward sword).
Nintendo pisses me off because of the general "screw you" attitude towards gamers, not the quality of their games.
I'm not personally a fan of boarderlands (as an example), but I can't really deny that its a terrific game.
Sure I can. They are (present tense) bad at making games. Personally I didn't enjoy Ocarina of Time, I never understood its popularity. It was one of about 20 N64 games I owned, but I never bothered much with it because it wasn't enjoyable. I did like A Link to the Past, and I've never played Super Metroid as I was a Sega kid. But the pitfall you've fallen into is that the examples you've shown are old as hell. It's like saying "You can't say Sonic Team are bad, Sonic the Hedgehog 2 didn't suck!" or "You can't say Square are bad, Final Fantasy VII is the best game ever!" Sure, games they made over ten years ago might be good, even great. But to believe they can ride on that reputation is foolish, and is exactly the reason they're bad at developing games now. Gamers got complacent, and gamers got sentimental. Nintendo could release Super Mario Potty Training and it would probably be a contender for GOTY because people suck Nintendo's dick.
Regarding Borderlands, I can easily deny it being a terrific game, or even a passable game. And I enjoyed Borderlands, a lot. I completed the original game 8 times (16 if you count playthrough 2) on two platforms. I completed every bit of DLC they released for it. Do I think it's a good game? No. I think Gearbox fell into the same trap Peter Molyneux did with the Fable games. They promised a lot, and didn't really deliver on it. The supposed millions of guns? Sure, I guess you could say there were millions of guns. But they were all carbon-copies of other guns with slightly altered stats or different skins, it would be akin to saying COD has over a thousand guns because each attachment, each skin, makes it a whole new gun. It doesn't. Add to that their pitiful security (with very little coding knowledge I was able to hex-edit my save file and totally change key aspects of the game) and yeah, I can definitely say it wasn't a great game.
You don't have to like or dislike something to have an objective opinion of it. Like I said, I liked Borderlands, but I can see its flaws. Lots of the games I love aren't perfect by any stretch of the word, but I don't poo-poo criticisms towards them with "well yeah but the devs made a good game 17 years ago".