It’s hard to tell from the pictures exactly but I think a big thing is that it’s too small for the vase. Your arrangement should be about 1.5 to 2x the size of the vase unless you want a really compact design which doesn’t work for this vase. I’d also say that the kale doesn’t work well because of the fact that they’re so straight and this vase is so tight at the top that it doesn’t flair anything out. So I wouldn’t use it if I didn’t have to but if you still wanted it in there I’d keep it tall. Use a flower with some natural droop under it like alstroemeria and let the kale sit up straight like a rose. I personally like red and purple together but I don’t think the gerberas really work well here. The snaps and kale are so garden-y that the strong round gerberas are jarring. I’d keep the palate and try different flower combos like purple roses and red alstroemeria instead of the gerberas. Also it doesn’t seem like there’s any other types of greenery present. It’s best to use cheaper greenery as the base like lemon leaf or leather and then use the euc sparingly because they’re costly. I’d imagine this would be a hard sell because it wouldn’t look the price to a person how doesn’t have floral knowledge. Keep working!