Yes, it was a rude outburst. Aside from that, he has a right to be frustrated - just look at the state of the game. Completely underwhelming - I'm not even talking about bugs of which there are many - everything from the stats, "class" system, skills, progression and leveling up is downright bad. There's nothing satifying about it and it makes little sense. Maybe most don't feel this way, but I'm having a hard time understanding what stands out about this game. Even the conversation aspects are underwhelming to me.
The sad part is that Cromcrom does sometimes have good ideas and he isn't necessarily wrong. He's is not unique in his frustrations and his desire for a better game It's just that the way he expresses himself is far too over-the-top that it drowns out the good points and ideas he does have.
The game absolutely does need a lot of work and refinement. Even if the development cycle doesn't allow for weekly patching, Larian's approach of one big patch every three weeks may not be as helpful as smaller patches every two weeks. When I heard this morning that the patch may not drop until potentially April 7th - a full month after the last patch, I decided to stop playing until it drops.
Before you say "this is alpha", try to remember that it's currently scheduled to be released this spring. That means 3 months, tops. Is Larian giving us a 1 year old version to test? Sure, it can be pushed back - but from what I've played it feels like it would take a minimum of 1 and a half years to fix all of the problems, mainly because I feel that they should scrap the current stat/skill/character progression and start from the ground up. It's absolutely horrible in it's current state.
I don't consider it a lost cause though, and I'm willing to wait a year or longer to see if the game improves. But for players who have been waiting, paying and supporting since... 2012? They are going to be frustrated.
Part of Cromcrom's disgruntlement with the game was that he didn't seem to like any of the mechanics behind it at all. Will the entire system be scrapped like you and he want? It's possible, but I suspect that it's more likely to be refined than completely scrapped at this stage. They'll never please everyone, and trying to reinvent the wheel for a year would certainly also frustrate players.