Ok mister fanboy I see that you absolutely love the BG3 demo and for you everything is obviously just great and there is no room for improvment.
Yes, BG1 and 2 had some humor in it, but it wasn't over the top and the overall game was dark fantasy.
The humor used in DOS games is all about parody of some old style crpg games. I don't like it and don't want to see it in BG3, neither do other people.
Whom are you calling a fanboy, and for what? And why? You shouldn't call people names based on assumptions.
I personally didn't like D:OS I and II. I assume you meant I'm a fan of those games - but I am not. I bought/backed both but quit both games after a few hours: not my cup of tea - too goofy indeed and mechanically weird (although I appreciate the general systemic approach Larian uses).
I am indeed a fan of Baldur's Gate I&II, Icewind Dale I&II and Neverwinter Nights I&II though. Dragon Age: Origins, too. I'm also a fan of Pillars of Eternity (pretty dark tone overall, not that many jokes besides certain banter) and Deadfire (more light but still serious). They all have RTwP by the way so please don't accuse me to be a Turn Based fanboy either. I think I am one of the players with the most hours in those games (besides some QA folks maybe). I think it's 10k hours of RTwP RPGs games combined. Pretty fanboish I guess. I even played Tyranny for 250 hours but didn't like it very much. D:OS I and II only entertained me for 8 hours each until I quit.
Yet I am not hell bent on idealizing those games I love and put them on a pedestal while dragging new approaches like BG3 through the mud after seeing a pre-alpha gameplay reveal which actually looked pretty darn good for only 8 months of development. Not even speaking about the amazing cinematics (for what used to be a non-AAA studio that made CRPGs without big cinematics so far).
I can very well separate one game from another. I can also like different combat modes or art styles. I also can analyze things I saw without using blatantly hyperbole and nonsensical statements like "beaches are silly and stupid" - I mean come on... really? Those are beaches. What should they have to make them less stupid? Black sand?
You can totally feel and express that you don't like what you saw so far. But don't expect people to simply swallow it when you use such a provoking form. How you say it can be as important as what you say. If you really want the game to become darker and not only to vent steam your goal should be to convince the developer that you have some valid and solid points and present them decently and with persuasiveness. Calling beaches stupid and silly just makes it hard to take your arguments seriously. Your opening post was unconstructive, unitentionally funny and goofy itself because you chose to overexaggerate every point you wanted to make and tried to paint a black & white picture when comparing BG I and II with what we saw in the reveal of BGIII. A more reasonable approach would have had more impact on anybody who is in the position to alter the game (if a single forum post has any impact in the first place).
As I said: the teaser and cinematics so far were pretty dark - even gory at some point. So it's not unreasonable to assume that the whole game will have a darker tone than the light-hearted D:OS games. Maybe - just maybe - some lighter tones and moments in the beginning of the game will be used to have a bigger contrast once the events take a darker turn?