Standard launch thread. Some people have problems, complain a lot and very loudly. Then you get page after page of "I have no problems" and people insinuating that it's all made up.
There seems to be a few different categories of issues the Switch is suffering:
1. Software bugs. Should be ironed out over the next few patches. Annoying, but not unusual. Worse for those who wind up with bricked consoles, though I gather they have been (or are being) replaced.
2. Quality control issues. Joy-Con connectivity, dead pixels, other issues with the quality of the LCD panel. Naturally, only some users would experience these problems.
3. Design problems resulting in damage. Joy-Con grips getting stuck if accidentally applied backwards. The screen getting scratched when moving in/out of the dock. Again, this isn't great. The screen in particular seems like a complete failure of design on Nintendo's part; they made a bad choice in materials for both the screen and the inside of the dock.
4. General design issues. Not being able to charge the Switch in tabletop mode. Ergonomic issues surrounding the Joy-Cons. The kickstand breaking off. These aren't issues as much as they are areas for improvement for any revised console coming down the pipeline.
Number 1 will largely be random. Number 2 will only affect some people. 3 likely affects everyone if they're unfortunate enough to cause damage to the Switch. And 4 is fairly irrelevant moaning. The telling moment will be watching how Nintendo and retailers handle points 2 and 3. Spending £300+ on a console that is broken out of the box, or breaks easily due to flawed design choices, isn't really acceptable. It isn't something that should be brushed aside or ignored.
For those people who have no issues, I'm happy for you. That's great. It doesn't mean others aren't having problems though. The measure of any great company is how they respond to those issues. Nintendo's response to the left Joy-Con issue is somewhat reminiscent of Apple's "You're holding it wrong" moment with the iPhone 4, while their response to complaints about dead pixels and other screen defects has been cold; "Tough luck". Not really the right way to respond.