I don't think anyone here really HATES the Tundra, but there seem to be two dominant groups of people here:
One group seems to think the Tundra is the most innovative, revolutionary pickup ever built. Some even think Toyota can do no wrong, to the extent that they think people coming here with problems (piston slap being the most obvious example) are paid employees by GM or Ford trying to ruin the Tundra's sales. Personally, I think a few (NOT all) of the people in this category are so blindly loyal to the Tundra and Toyota that it borders on arrogance and/or ignorance, which is largely what fuels the debates about this truck.
The other group (myself included) doesn't necessarily dislike the Tundra, but they don't believe it is as revolutionary as people claim it is. They might also think that the reliability/quality gap between auto manufacturers isn't what it used to be- either that Toyota quality has dropped in recent years, or domestic quality has risen, or a little bit of both.
Personally, I don't see the Tundra as an extremely innovative or "class leading" pickup. I do believe it's a very nice truck, and quite capable. But while it has the largest towing capacity of 1/2 ton trucks, it doesn't have the largest payload capacity. Yes, it can do 0-60 and the 1/4 mile faster than any other truck, but so what? We are talking about trucks here, not sports cars. 0-60 times are great to brag about and to sell magazines, but really have little bearing in the real world of stop-and-go driving and highway cruising. Probably my biggest problem with the Tundra is how expensive it has become. It seems that comparably equipped Tundras are $2-3k more expensive than rival brands, before the obligatory incentives and low financing rates other brands are willing to give.
Personally, I think the Honda Ridgeline was more "revolutionary" than the Tundra. Not to say it's better- I don't think that at all. But Honda did re-think how the pickup truck can be used, by adding a water-tight trunk that can double as a cooler for tailgating, giving it independent rear suspension, and other things. However the lack of a V8 engine really only makes it good for daily driving with occasional trips to Home Depot on the weekends, not any real hauling, towing, or work duty. But thats not my point. My point is that the Ridgeline incorporated that "outside of the box" thinking that you need to create a vehicle that is more "revolutionary" than simply "improved". The Tundra took the traditional truck format and added more power. So while it's one of the most capable pickups available, it is not in a class by itself, and it is not THAT innovative.