Theres nothing in Catholic dogma to justify such doubt.
But I agree with you that doubt is about the individual, though what a particular congregation teaches can mess you up to one degree or another. For 25 years of my Christian walk I believed that non-believers went to a place of everlasting conscious torture. Then I actually studied it...
There need to be sermons, which could be shared across most denominations, about — radical idea — how God LOVES us.
I grew up NOT a Catholic. I have seen not only in various Xtian subsets but even in Buddhism (!) parents and elders using “religion” to inculcate guilt.
It makes me thing about millstones, depths of the sea, and such. It's bad enough that people try to tame God. it's outrageous that they use the idea of Him to control children by making them feel more guilty than loved.
Do. Not. Get. Me. Started.