Walmart - business tactics.
Starbucks - business tactics.
Nike - Bad products, bad company, and dodgy history when it comes to using child labour, and yet they didn't even admit it. Their marketing team made fun of disabled people, and ripped of "Major Threat" (remember the thread I started about this 2-3 months ago?)
.
Microsoft - Need I say more?
GM (I'll exclude the companies they bought, like Saab) - horrible designs, bad cars, and bad experiences with them. Too many SUVs as well.
Ford (I'll exclude the companies they bought, like Mazda and Volvo) - bad cars, bad experiences with them (no brakes, almost killed my (deadbeat)father who I haven't spoken to in 8 years anyway), and other Taurus only lasted 6 years.
Chrysler - Crap. Mercedes isn't included, although their cars have gone downhill as well since the merger.
Motorola - The "development" of the G4, and their mobile phones suck.
RIAA and the 4 major companies.
Dell - their products suck my ass.
De Beers - Because their diamonds, like all diamonds, come from a dodgy place in the world, and they're the biggest buyer of diamonds, as well as the biggest marketer of diamonds (along with rap videos

), making them seem priceless.
Best Buy/Future Shop (in Canada) - Their staff are just there. They exist. They don't know about their products at all.
Hummer.
And I don't agree with Sony being on everyone's list. They've only been bad recently. Their stuff used to last for absolutely ages.