My partner is bad at finances and is refusing to acknowledge any suggestions I make to better things What do I do?

I've (m27) have been with them (nb25) for almost 8 years now. We live together and split rent, bills and groceries but beyond that, we keep our money seperate which has worked. Only problem, were both in a lot of debt. I've got about $17k split up between a few different credit cards and a car loan. I've drafted up a reasonable budget and cut expenses to make a plan to be out of debt by the end of next year and have an emergency fund My partner has about $20k in debt. All of which is on their credit card at 20% interest. They just got a notice from her bank that their credit limit has been lowered to just above the actual debt and they came to me telling me they're stressed because they don't have that "wiggle room". They're constantly talking about how their credit card interest is making it so they can't make any progress and they feel trapped. I offered some suggestions and every single one gets shot down. I tell them they need to make a budget to allow for an emergency fund and set a date for when they'll be out of debt. "I don't need to, I know what I have allocated for everything". I say you should look at a consolidation loan or a balance transfer card to save money on interest. "I don't want to have to manage multiple payments each month". We can make an appointment with a debt specialist and see what our options are "I don't trust them". The real problem is they have no clue how to go without. They always buy whatever they want, when they want. We moved and they spent $1200 on a couch when we could have gotten a cheap used one. They spent $1500 on a bed when they could have gotten one just fine for a third of the price. There's always a new dress they want and can't go without because of fomo. I don't care about that. I don't care about the debt. I'm in debt in a bad way but it's just the constant shut down of any alternatives or any of my attempts to help. I'm tired and I'm starting to reconsider the relationship. Which sucks because I love them. They're always capable of paying their share of the bills but I feel like at this rate, there's gonna come a day where they can't.