The manga was good and the anime seemed to have a passionate following, I have know clue why they just decided to flush the whole thing down the toilet.
Maybe they're trying the AoT thing where it's The Final Season pt1, pt2, pt3.1, pt3.2. Though yea, it's got to be an anime original ending. No way they can cram the rest in one season.
That was my big disappointment with it overall. In the beginning they would go over actual science of chemicals and minerals and food, but then they just start whipping out phones and machines. It was still fun, but the science got to be almost fantasy with everyone's special abilities.
That was my second big disappointment, the first was Senku ignoring the existence of brazillian people and the fact they could have made alcohol from sugar cane