It also seems likely that flying a broomstick doesn't involve actually sitting on the handle, which would be uncomfortable indeed.

骑行一把飞天扫帚似乎也不是直接坐在它的把手上，这的确会很不舒服。

youdao

But her muscles are so weak that she topples over like a broomstick when she gets even slightly off balance, which happens often.

FORBES: For Arya