Yes. The old interface and old website really looked like 20 years old and it really was. It was completely unusable on any mobile or touch-screeen devices, which are gaining popularity in recent years and it does not look like this trend will reverse.
The page is being rewritten one part in a time, which means it might be confusing for some of the users, but geocaching.com is really big website and redesigning that in one shot would be very hard job.
As a conclusion, it is a change for good and you will just get used to it with time and appreciate it one day. I don't see a reason why so many people is hateful against any change that will show up in their life.