PySide How to apply smoothing (antialiasing)?

There is a drawn arrow indicator. Everything works well, but deep irregularities (burrs) remain on the red sectors. How to remove it?

from PySide6.QtGui import QPainter, QColor, QPolygon, QPaintEvent, QConicalGradient, QGradient, QBrush, QPainterPathfrom PySide6.QtCore import Signal, QSize, QRect, QPoint, Qtfrom PySide6.QtWidgets import QWidgetfrom typing import List, Tupleclass ArrowPointerIndicator(QWidget):    def __init__(self,                 chunks: List[Tuple[float, QColor]],                 lineWidth: int = 5,                 parent: QWidget = None) ->None:        super().__init__(parent)        self.__arrowColor: QColor = QColor(255, 0, 0)        self.__gradient: QGradient = None        self.setChunks(chunks)        self.__arrow = QPolygon([            QPoint(-2, -80),            QPoint(0, -100),            QPoint(2, -80),            QPoint(2, 10),            QPoint(-2, 10),            QPoint(-2, -80)        ])        self.__minimum = -10.0        self.__maximum = 10.0        self.__lineWidth = lineWidth        self.__value: float = 0.0    def arrowColor(self) ->QColor:        return self.__arrowColor      def setArrowColor(self, arrowColor: QColor) ->QColor:        if self.__arrowColor == arrowColor:            return        self.__arrowColor = arrowColor        self.update()    def setChunks(self, chunks: List[Tuple[float, QColor]]) ->None:        weightsSum: float = sum(item[0] for item in chunks)        chunks = [(item[0] / weightsSum / 2, item[1]) for item in chunks]        self.__gradient = QConicalGradient()        passedWeight = 0.25        for weight, color in chunks:            self.__gradient.setColorAt(passedWeight, color)            self.__gradient.setColorAt(passedWeight + weight - 0.0000000001, color)            passedWeight += weight        self.__gradient.setCenter(QPoint(0, 0))        self.__gradient.setAngle(-90)        self.update()    def paintEvent(self, event: QPaintEvent) ->None:        super().paintEvent(event)        drawSize = min(self.width() / 2, self.height())        painter = QPainter(self)        painter.translate(self.width() / 2, self.height())        painter.setRenderHint(QPainter.RenderHint.Antialiasing)        self.__drawColorArc(drawSize, painter)        self.__drawArrowPointer(drawSize, painter)    def __drawColorArc(self, drawSize: int, painter: QPainter) ->None:        painter.save()        path = QPainterPath()        path.addEllipse(-drawSize, -drawSize, 2 * drawSize, 2 * drawSize)        painter.setBrush(QBrush(self.__gradient))        drawingRect = QRect(-drawSize, -drawSize, 2 * drawSize, 2 * drawSize)        painter.drawChord(drawingRect, 0, 180 * 16)        painter.setRenderHint(QPainter.RenderHint.Antialiasing)        painter.restore()    def __drawArrowPointer(self, drawSize: int, painter: QPainter) ->None:        painter.save()        painter.setBrush(self.__arrowColor)        painter.scale(drawSize / 100.0, drawSize / 100.0)        painter.drawConvexPolygon(self.__arrow)        painter.setRenderHint(QPainter.RenderHint.Antialiasing)        painter.restore()if __name__ == '__main__':    from PySide6.QtWidgets import QApplication    import sys    app = QApplication(sys.argv)    window = ArrowPointerIndicator(            chunks=[                (4, Qt.GlobalColor.white),                (1, Qt.GlobalColor.red),                (1, Qt.GlobalColor.white),                (1, Qt.GlobalColor.red),                (4, Qt.GlobalColor.white),        ], lineWidth=1000000)    window.show()    sys.exit(app.exec())

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I applied Antialiasing wherever there is Painter. Tried different combinations, but it looks like smoothing doesn't work here.

I had to place the code very tightly, sorry for the inconvenience.