Especially this is not really D&D. Yes of course the rules and algorithm of the game are based on that now, but the logic and overall feeling is not what D&D.
I played some tabletop rounds and never ever introduced a group like "yeah iam a half elf, but my secret is that iam evil vampire". "oh wow and I have a bomb in my chest"... Also you were never able to set your arrows magical on fire especially on level 1. You were also never able to do the hulk jumps. There's so much that's not D&D even from a gameplay perspective.
I've played almost 40 years of D&D and have been playing video games even longer and I've never seen anything so much resembling tabletop D&D as the BG3 gameplay reveal.
Nobody in that reveal introduced themselves as "yeah iam a half elf, but my secret is that iam evil vampire", you are simply making that up. And the "bomb" is something those mentioning it know of eachother as the have seen eachother on the ship and are aware of what happened, and there is a telepatic link between the characters due to the tadpole in their brain.. Again you are simply twisting the truth to make a point.
The "hulk jumps" clearly also is a side effect of the tadpole in your brain, so again, no issue there.
If you think "There's so much that's not D&D even from a gameplay perspective." you aren't very familiar with D&D, if at all.