Hi Sherry,
I just wanted to drop you a note of encouragement. Being in quarantine and seeing the effects that it's having on everyone, I can understand you're feeling disheartened. The world seems so uneasy and turbulent, even more so lately.  
If it helps any, I also understand the frustration that comes from being a creative entrepreneur. As a freelance illustrator for 20 years, I have dealt with all sorts of feedback, reviews, and comments. Especially portfolio reviews - some would make me smile for days and others, break down in tears. An agent once told me that my illustration looked like it had been drawn with crayons (yeah, not good). The best advice I ever received, was to keep what I needed and leave the rest. Simple, but true. Art will always be subjective and that's what makes it great.  
Your shop/cards have a lovely patriotic spirit and I am always amazed at seeing shops (like yours) that have so many cards! That is such an accomplishment in itself! Keep making cards that you love and want to share with others. And if there are some cards that can be easily revised to meet the updated GCU recommendations (especially the designs that you mentioned sell well) then adjust and resubmit. Tackling a few a day would add up pretty fast. At least, that's what I found when I resubmitted cards that had been returned for edits. The cards that I had declined, I just deleted and tried something new.  
Anyway, I hope that this makes you feel less alone in this matter and might even help in some way.
Sending you some    
Lisa

Thank you, Lisa and Kate, I appreciate the messages. I'm now down from 780+ cards to 177. I
m not even sure they're finished going through them. It's very disheartening, to say the least. I've had a lot of compliments on them throughout the years. At this point, I'm not willing to spend time re-doing any that I've spent hours creating. Maybe sometime in the future. Who knows. My hubby and my daughter both say forget it. I look at as GCU's loss. They made money off the cards, I certainly haven't gotten rich. It gave me a little spending money. I'll survive. At my age, I've learned," not to cry over spilled milk." There are other more important things in this world, especially right now. Thanks again.

Well, Final count, I have 34 cards left out of almost 800!! Sorry, Doreen, but probably not going to redo most. Too much time for so little profit. I'm not spending a year or more of my life after the time I've already spent creating them. One card may have taken me a day to a day and a half to make. Nope. More important things in life, and at my age. It's GCU's loss. I sell cards here every day. I have people tell me all the time they love my cards and my shop. So c'est la vie. Life goes on. I'm not leaving, but the store will have 34 cards!