Is it too much red? Personally, I think it's a lovely quilt, but I do understand that we sometimes are disenchanted when we've finished something and can't quite figure out why. The fabrics are very nice, I like the way you've used them. The borders are perfect. And Warm Wishes makes for an interesting look, I think.
Maybe if you put it away for awhile, you'll like it better later. If not, then yes, donate it. Someone will love what you cannot.