I think it might be a case of a different perspective - they just might not have seen things in the same way as you.

You may feel acutely aware of some of these things that happened, because they hurt/affected you - they just might not have paid that much heed because they didn't pick up how much it affected you.

It's been my experience that many of us have selective memories in this way, favouring our own perspective. My parents certainly don't remember things in quite the same way as me and my sibling. Interestingly me and my sibling have very similar memories, perhaps because of shared perspective.

It doesn't sound like 'gas lighting' to me, as I understand it that is a very deliberate technique used to make people doubt their sanity.