The fact that it smells like rotten eggs indicates that the catalytic
convertor is plugged and thus needs replaced anyway, plus that would
likely produce the symptoms it has, such as wanting to die, etc.
A reputable muffler shop can test the pressure before and after the
catalytic converter to determine if it's plugged or not, usually do this
free of charge. If it is plugged and you replace it, the other problems
may well disappear.