I have 22 hours (some of that may have been left on overnight one night) so far on the new game, I have not been dumped to desktop, had the game freeze on me or been unable to do what I have set out to do. Honestly it's been loads of fun so far and the bugs are very kerbal. Yeah, I can see if I set out in a ship that took me hours or days to build and I spent the hours or days getting it somewhere incredible to have it lose all it's fuel or be unrecoverable is frustrating. It happens in KSP 1 too, after a decade of development, whether they were a major studio or not if you could iron out these problems easily they would have done it.
I see people misunderstand the underlying game mechanic of KSP and say Kerbal 1 errors are brought over. No this is new code, if KSP 2 has an issue similar to KSP 1 it's that they both model physics joint's between parts. I don't know another game that does this to the extent KSP does, especially the sheer number, 100's to thousands. It makes for wobbly rockets, things being ejected at light speed and the Kraken. It's what made Kerbal the game it is, probably the most realistic space engineering simulator game. It also made KSP 1 very CPU bound, KSP 2 is like a heavily environment moded KSP 1 which has finally started stressing the GPU too, the fuel system also is part of the physics. In KSP 1 it was having issues as well, years after release, it's easy to find the posts, as were part counts, which often went up and down according to the latest patch, or fairings glitching, wheels not working correctly, they had a whole release just around adding a new wheel plugin and then spent forever tuning it. I just flew to Duna in KSP 1 the other day as a farewell, had to wait for 15 minutes for my craft to stop sliding down a very minor slope.
The nature of KSP says that the game is going to have these sorts of issues, it straddles the border of simulator and game. I think it's popularity derives from a dozen different things, but usually people call it crap for only failing whichever one they are most interested in.
Take a step back, it's a game, it's going to get better, and probably more expensive, if you buy it now you are not getting ripped off, the fixes and features will eventuate, probably not all of them, you would have to be naive to believe that, but at least things like game modes (science etc), possibly interstellar. But mainly because it is a much newer base the community content is going to come for it. What the developers don't deliver the community probably will.