It is the opinion of the majority of Android users that Samsung makes the best Android smartphones. That is a fact. Reviews show that Samsung has the highest rated smartphones. Sales show they're number one too. They're fast phones with the best cameras, best displays, best features, and top of the line hardware and build quality. They're basically bad at nothing, which pretty much no other hardware manufacturer can say.
It's the opinion of most people that Beiber is better than Prince, his record sales say so.
The Backstreet Boyz are better than the Beatles.
Jay Z is better than Biggie
Iggy Azela is better than MC Lyte.
In other words, opinions are not facts. It's your preference that Samsuck phones are bad at nothing, but it's a measurable fact that TouchWiz is laggy garbage that runs duplicate versions of everything. The Samsuck version as well as the Google version.
One only needs to go back to the GPE of the S4 and compare it to a Samsuck S4 with all of its garbage bloat on it.
It's night and day. Samsung sucks, the Galaxy line of phones are trash and its only brilliant marketing keeping them in the game.
When you talk to iPhone converts they will supply two things, I had a Droid or I had a Galaxy, and they sucked. That's why they switched.
The Droid was kneecapped by Verizon, and a ton of people had one of Samsuck's two hundred different mid range or low range fail devices.
The uninformed masses think that Samsuck is Android and it has hurt the perception.