NTA

As someone who grew up poor and sometimes didn't have money for a tree and would get a shared gift for birthday and Christmas, I promise you that your partner loved every second and provided gifts because she could and wanted to, not to buy affection. I buy my cousin gifts he wants not because I want him to love me, but because I know what it's like to grow up poor and not be able to have the things you very much want. Now I have money. I'm not rich or anything, but I work and I have enough to save up slowly for a deposit one day. But I can afford a gaming chair so I got him a gaming chair one of the previous years. That sort of thing. I love Christmas. Giving gifts is the best part of it.