Dear Harry,
You really are going the right way about it, aren't you?
You and your wife have aired all your grievances in public in every way you could possibly think of and made many private matters public, which would have been better kept to yourselves.
You may have been unfairly treated, I am unable to judge that, but if you really want to mend bridges STOP MOANING and KEEP YOUR MOUTH SHUT, BOTH OF YOU, about the relations you don't see eye to eye with.
Give things time to settle down, and get yourselves both jobs that are within your capabilities, preferably somewhere where no-one cares a hoot who you are.
Show that you meant it seriously when you opted out of "the family firm" and make yourselves a decent income through hard work like most of the rest of the world has to.
In five years or so, your father and brother might just be prepared to talk to you again.
Or make your way to Uncle Tino's funeral and see if you can behaved properly there. Your Greek or Danish cousins might just be willing to try to convey your apologies to your own family.