Hello, welcome to OSM and thank you for your contributions. Some of the "pointy" building outlines you have mapped probably are inaccurate. Particularly something like https://www.openstreetmap.org/way/1333361615 where the sticking out triangle you mapped is just the roof seen at an angle. Admittedly, there is some guesswork involved with that at times. If you are particularly interested in mapping buildings, you can also have a look at rapideditor.org. There is an AI based building outlines and a Chester county building dataset that needs human validation (you can accept a building and still make it match the actual outline manually if it seems off).