Her essentially 3 reasons for renouncing essentially and my responses: >I could vote in the US, but no one represents the needs of US citizens abroad because our votes are dispersed over all 50 states. * there's hundreds of millions of people and only two parties in the U.S. no one represents anybodies needs well >I pay almost $1000 per year to an accountant to fill out the forms—more and lengthier than they’d be if…
If you have access to your spouse's account you may need to enter that into the FBAR form https://en.wikipedia.org/wiki/Bank_Secrecy_Act#FBAR Regarding the difficulty of investing/borrowing outside the US: Non-US banks are required to report stuff to the US if they have US customers. So they might not want US customers because it's a hassle for them.
The problem in the Netherlands isn't so much expats who grew up in the US, but "accidental Americans" who were born in the US and left as small children. They are US citizens, but don't have an SSN, which Dutch banks require to comply with US law (and with pandemic-related embassy closures, obtaining one isn't necessarily easy).