It absolutely used to suck performance wise since I used an S4 for about 2 years. Since then, it's been great. As someone who used to dislike the performance, and now loves it, even over chromium stuff, I can safely suggest your oversimplified opinion is without any real basis. Sucks is such a vague word, and I guess it stops you having to detail and rationalise your personal opinion.

It's always been great on the desktop.