No, it is much nicer than the 737/A320 class. Just thinking of the curve of a 737 makes my neck knot up. Bigger planes like the 747/757/767/777 are much more comfortable as well as modern planes like the A220/E195. 737 class planes are so ubiquitous that many passengers have no idea another experience is possible.
The 767 2-3-2 layout is my favorite, with only 1 middle seat per row, yet still two aisles so you can use one while the other is blocked, or walk little loops if it's not.
On the A380 you get to enjoy the higher ceiling also in economy. It does make quite a difference for how cramped you feel, even though the leg room might be the same.
And both B747 and A380 fly much calmer than the smaller, lighter widebodies, which is equally nice for passengers on all classes.
I had a long haul flight from DFW-SYD that had plenty of empty seats to the point they offered an upgrade to guarantee you'd be the only person in the row. Best spent $100 ever related to airfare.