They've delivered 2.3 with a barely-functioning multicrew at a minimum viable product standard over 8 months ago, it hasn't been developed furtherand remains very unstable. That was when they didn't have enough "time or resources" to develop it properly. They delivered 2.4 to a standard that is probably below a minimum viable product and in many ways it has been even more underwhelming than multicrew. FD has shown us a clear pattern of underresourcing Elite and delivering a minimum viable product during the past two years of Horizons development and you expect anyone to believe that they were somehow doing any significant work on Beyond or atmospheric planets during that time?
So, by your own words, multicrew is viable. Such as if I had the minimum to make a cup of coffee, I could make a cup of coffee. Your argument appears to be that FD didn't develop it to your expectations. While that might be a capital offense to you, it means nothing to me. It probably means something in-between that to most other players.
For me, 2,4 meets expectations. It evidently didn't meet yours. Maybe you need to lower your expectations to a more reasonable level.
Beyond promises to improve the game by leaps and bounds. But feel free to expect more than is reasonable there, too.