If you didn't create your wallet on an air-gapped device and it was connected to the internet, you didn't really follow all security recommendations. Take note that any online device is always prone to hacking.
I was connected to the internet but only from my home internet connection and from my personal PC. I never did it any other way.
Unfortunately, I didn't have the possibility to use a cold wallet and that's why I had to do it like this. But I insist, I don't think it was a hack because if it had been that they would have emptied the entire wallet and they didn't.
Now, assuming that maybe it is something almost impossible, I don't know if someone can help me to recover the funds or at least a part of them. Obviously I can give a reward for it in the case of success because I am not an expert by any means in this type of thing and honestly I don't know what else to do
Once again thank you all for your answers.