Fallout 3 was magnificent, a wild commercial success and one of the greatest CRPGs of all times.
I'm sure Fallout 2 was good, I don't know because the control system is so bloody awful I couldn't get more than 2 hours into it.
It is acclaimed, but it's hard to replay it.
In today's world it is a bad game. Fallout 3 is still a good game.
Bethesda games are constantly replayed. Skyrim, fallout 4, etc. are all still on Steam charts top played lists.
Right NOW. 10 years after release
Fallout 2 is not.
You are on the wrong side of fact Vs fantasy.