I don't know, I feel like that's a bit of a stretch. If god exists, creation is because of them, and early humans and faith are shaped by them, then the concept of a god who purports themselves as objectively good despite subjective proof otherwise doesn't seem unlikely. The idea that god might not be good in the way we think good should be is relatively modern and prior to the last 100-200 years god was good because everything prior said so. For fucks sake most people couldn't read and just trusted the guy in robes to tell them what to think.

So yeah, just like me trimming a plant and putting it in rooting hormone 1000 times, I think an all powerful and knowable god could theoretically always inevitably result in Christianity if they wanted, the bar isn't that high when the majority of the species lifetime is dismally stupid.

Also, your argument is inherently flawed if you think the contrast of a good god must be an evil one. Concepts of good and evil have fluctuated wildly over the centuries, both in location and sentiment. If god made everything and said they are good then at best good to us doesn't mean the same thing as good means to them and trying to frame the argument in that is meaningless.

At the end of the day you get to decide if you believe in god or not, if you do believe in god you can still decide whether you like "god" and want to follow it; however, making the logical leap that god doesn't exist because they aren't good by your definition is fundamentally flawed.