I feel like there's a good amount of FUD about this, so for anyone who might not know: All online file hosts do CSAM matching against known CSAM images, regardless of the client OS(s) you're using. In Apple's case specifically, matching only happens to images you've uploaded to iCloud Photos.¹
¹ https://www.apple.com/child-safety/pdf/Expanded_Protections_...
Apple's Plan to "Think Different" About Encryption Opens a Backdoor to Your Private Life.
"That’s not a slippery slope; that’s a fully built system just waiting for external pressure to make the slightest change."
https://www.eff.org/deeplinks/2021/08/apples-plan-think-diff...
It's great that you've found an alternative that suits you but I think it's disingenuous to argue that Apple is the culprit.
Talk to your representative.