iPhone 12 Max Slow response to Screen Capture

Hi there,
I have a 12 Max with 256GB, and am just utilizing 90GBs of my total storage, yet my iPhone keeps getting slower.

mainly when doing a screen capture, like today I took a screen shot and I didn’t get the image I until I logged into this site and started typing my question!

it almost took a minute!!! How can this be solved?

whatsapp keeps getting slower as well, only loads messages after I open the app, although the notifications have been there for hours!! My WhatsApp is not that huge too, in my Xs I had a bigger WhatsApp archive.
iPhone 12 Max Slow response to Screen Capture
 
 
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