Then go here and tell them what you think of it. When I clicked on the comment button there were 24 pages of comments. By the time I clicked 'post' it was 25, and 5 minutes after that I refreshed to see it was up to 26 pages. But don't let that stop you from making your opinion known. Remember, there are 10,466,239 LJs, so that 26 pages of comments is still a tiny minority.
Yes, I dislike the new look that much.
ETA:slodwick has an interesting list of suggestions of things they could be focussing on instead - here. ;)