Aw. I can understand your frustration. It IS disappointing when your family do not appear to appreciate and share the amount of anticipation and time and effort that went into the "fruit" which now sits on the counter. And when you yourself are unable to make use of it, the family does nothing to consume or save the product of your labor. I've been there -- I AM there.
For now, I urge you to simply freeze the harvest at peak of flavor so they are not wasted. In a crunch, you don't even have to prep/pre-process. Just wash and drop in a dated ziplock freezer bag whole, and tuck in the freezer until you are able to deal with them.
If you want to eat the tomatoes and peppers fresh, eat them fresh yourself (I know you *want* to save them for them, but you eating them will will be satisfying in its own way and will contribute to your own health (for their sake) and think of it as taste testing to see if you are satisfied with the variety enough to grow again or If you will want to pursue different varieties next year. Grab a knife and cut them up, offer but don't insist they eat and don't blame them for not eating -- trust me, I've pressured them plenty of times and it doesn't feel good for them or you (if anything, it turns them off even more). Pack your harvest for eating at lunch or even give them away to friends and colleagues if you can handle the "appreciation from outside sources vs. not from the family conundrum" (Told ya I've been there
If you only have a small garden and per diem harvest, accumulating in the freezer until you have enough to "make something" adds to the pleasure of gardening.
BTW, if the tomatoes and peppers are open pollinated varieties and not hybrids, you can save the seeds even after the fruits have passed the good to eat stage (though doing that too takes time and effort).