I share your befuddlement. Eclipse is good and overall better than even paid proprietary IntelliJ. I think there is a lot of bandwagon jumping, especially with newish devs.
I've used Eclipse, Netbeans and Intellij extensively for Java dev. Eclipse is my least favourite. That said, I haven't used Eclipse in years and Netbeans has been lagging in innovation since going to Apache
I use it quite frequently (one of my customers insists on it), and I actively dislike it. No amount of "trying it" is going to make it any better. I hate the look & feel. It gets in my way more often than it helps. It's *slow*. It's a resource hog. And its weird insistence on tying "projects" to "windows" bugs the shit out of me.
Most of these are subjective, but hey, I tried it.