I agree that the cabinet was probably better off with her in it... however, I always felt that she seemed woefully inexperienced for the job. No idea who is experienced enough... but in TM's cabinet where BoJo can be Foreign secretary, I don't suppose experience counts for much anyway.
Also agree that this instability is not good for anyone. However, they were showing the stats on Home Secretary's tenure on Peston this morning... Amber Rudd is one of the longer serving Home Secs, it's quite common for them to fall far earlier than she did.
I would put money on there being another general election before the year is out