Easier ≠ better. Granted, most amateur-written UIs aren't that great, but I find anything created specifically for the web is almost always worse. They're massively bloated, they reinvent wheels all the time (and ship them out while they're still egg-shaped with off-centre axles), and they don't adapt well to systems with non-default settings.

As for Java UI coding, well, I did enough of it, back in the day. Tedious, sometimes nitpicky, but far from the worst thing I've ever done, codewise.