Not completely true. A lot of people compare it to No Man's Sky as well. That's where a lot of the grumbling comes from I think. NMS did feature X, why hasn't ED got it. It must be easy if NMS has got it in.
To be honest, when you compare it on steam charts to some of the other 'Big Players' in the space genre, Elite is doing quite well.
1. NMS is at the top. Firstly, because there's a new update which always makes the numbers shoot up for a month or two as everyone checks out the new content and, secondly, Steam is the only platform where you have access to multiplayer functionality on PC, so there are a lot more Steam owners. It normally settles down to about an average of 1000 players higher than elite.
2. SWTOR :- That remains consistently about 1000 players higher.
3. Elite Dangerous :- Still remaining about the 4000 players per day average.
4. EVE :- That appears to run between 500-1000 average players lower than Elite Dangerous
5. X4 :- That's normally 2000 player less than Elite Dangerous but it has had a major update last month so the numbers will spike over the next month or so.
The way some on this forum act ED numbers are close to zero, or maybe they wish they were.