To say Fallout 76 is buggy is quite an understatement. At this point, some of the bugs, exploits, and problems are just hilariously bad.
The only thing the Fallout franchise really has going for it is storyline and exploration. Fallout b76 is short on both.
Bethesda has been working to clean up the game problems but it may be a while before the game is stable enough to get past the criticisms. So far recent updates have fixed some of the problems but there are still lots more issues to fix.
Some players expected the game world to be populated but players are facing a barren and lonely land. While the game is co-op there are no NPCs and no discernable story line.
Some forum post reminds people of an unpatched physics problem with Fallout 3.