Girlfriend has a copper IUD, it's a nightmare and she doesn't want to remove it, help

Hello,

My girlfriend got a copper IUD ~3 months ago, after having to (very) painfully retry the insertion with various models 5 different times. It took so many tries and pain due to a uterus malformation she's had since birth. She really does not want a hormonal solution (which I totally understand) - that's why she was so persistent on trying to have one successful insertion with a copper IUD.

However, for the last 3 months, her period cramps have been absolutely awful, and her period duration has extended. Moreover, she now starts feeling pain a few days (~3) before her period starts, and her menstrual cycle has somewhat contracted. Taking all of this into account, she spends almost half her time being on her period, in atrocious pain, with a terrible mood. And I mean, terrible. Every word I use is a step on a mine field, this is just awful to live, both for her, and the people that love her.

I tried to ask her 2 times about the IUD choice, but she really has a phobia about getting pregnant, so she made it clear that she won't remove it and that I should stop talking about it.

I feel powerless and honestly so fucking sad, the IUD has really hindered our relationship.

So here I am, hopeless, asking you for any potential experience, hope, guidance, light medication that could help with the cramps, etc. Has anyone here lived a similar experience? Did it get better with time? Is there any light medication (non hormonal, if possible) that can help with period cramps? Maybe she could consider light hormonal medication that helps with the period duration and intensity, if anyone has something to recommend?

Thank you in advance.

EDIT:

Seems like I'm a terrible writer, I've edited the post because of the amount of misinterpretations it has produced. Just to be clear:

- I don't believe her fear is irrational, I totally ackowledge it and understand it

- I have not forced any opinion on her and I'm not trying to forcefully convince her

- I am being extremely supportive, making sure she knows I love her, she can talk to me about anything, etc.

- I have thought about vasectomy. I asked my doctor about it and he strongly advised against it given my will to have children and my young age.

- I have also thought about the male pill (not on the market yet) and heated underwears. Problem is, my girlfriend told me she would still feel too anxious if I was the one in charge of the BC, which makes sense.