Holy crap! Look at all the pieces all over the fan shroud etc!
Yeah, after doing a flush myself this summer big time, this is glaring. There are particles throughout your coolant system.
When was the last time that hose was replaced? And flushed?
I would suggest you pull your thermostat since it’s already drained.
Then put in Thermocure and fill with distilled water.
Run it fir two days here and there etc, time for the stuff to react with rust, which looks like your system was all rust water and particles.
Then drain and the block too. Fill with distilled and run it fir 2 minutes, and drain again and repeat until clear.
Then put a new Thermostat in and fill with 50/50 Zerex HOAT.