I am a new apple customer, recently joining from samsung and windows, now own iphone 12 and MBA M1. A number of factors made me move to apple, but two of the biggest ones are reliability and privacy.
And now the CSAM. I feel like i made the wrong move switching to apple.
Should I leave apple because of this CSAM thing?
Since you said that you made your purchase decision to buy Apple products based on their claims of better privacy and reliability, then yes... you made a mistake. Primarily because you paid a premium for something that you didn't receive.
There is no privacy anymore. There hasn't been any real privacy for at least the last 20-30 years. With regard to reliability, Apple's iPads are very reliable. Their iPhones, a bit less than that, and their notebooks... not so much. But personal experiences vary widely so one really needs to draw a conclusion on their reliability as a result of their own first-hand experience.
Having said that, there's no need to rush out and get rid of your iPhone and MBA. Use them. Enjoy them. Be careful about getting entrenched in the Apple ecosystem though, because it will make it more difficult for you to exit Appleland should you decide to.
I was only mildly connected to their ecosystem and it took a while to get to the point that I can leave with little to no difficulty.