I dont disagree that forums could be more active, but just check history of the OP.
It’s the type of user who disincentivizes engagement IMO. They ask a question, get an answer, then want you to build the game for them and won’t even attempt to work through errors on their own.
There is no point trying to help person like that because they won’t help themselves. The best you can hope for is that your answer may help somebody else who has more game-making energy, however if the problem is very specific that is not likely.
As for epic developers participating - yes it is a shame but I guess they have no incentive to really and it is a business. They are putting out a lot of tutorials and such though - at least in my case I have not found unreal so difficult to learn. Actually, in my experience, compared to unity, it is vastly easier. That isn’t entirely because of forums and tutorials and such, but mostly because the editor actually works. And you have blueprints.
So, is there stuff to gripe about? Well, I am not losing any productivity with this engine so I don’t have anything personal to gripe about.
Is the OP helping or contributing to problem? Contributing, I think. They ask two questions before complaining about forums, and apparently have never tried to help anybody else? That’s not teamwork that’s going to make any dreams work.