Dear Marcel,
I've only discovered the various drama that have affected both your personal and dev lives because I hadn't been on this forum for months and hadn't updated FE for quite some time (FE is so good and already satisfies my needs well enough that I don't feel the need to upgrade too often). So reading backwards through 40+ pages of this thread was a shock to me.
First, I hope your GF keeps recovering. Life in good health is so precious.
Second, I want to reiterate my strong support to you. FE is by far the best email client out there. I couldn't manage my multiple accounts without it and would be quite desperate/sad should its support end. And you Marcel are the nicest and most dedicated dev I've ever "met" either virtually (through public forums such as XDA) or in person (at my workplace). So, whatever the next steps I want to warmly thank you!
I hope you'll be able to learn how to become insensitive (or less sensitive) to unfair negative comments (this earth is full of as***les and you have no control over this). You should only feed yourself with positive energy received from all the good people who love and respect you and your fantastic work.
You're having a strong positive impact on people: not only the daily happy users of your apps, but also now beyond. Your story has been in the media, and now it's seems that some political parties or lobbies could use your story to encourage the EU increase their support towards independent dev, FOSS, etc...
So now you're reaching a new iconic status, and you'll have to learn to live with it!
Sending more positive energy
from France