The second element that fails on this form is the set up in the "donation amount" section - The overall appearance of it, as well as the fact that the radio buttons are separated from the "other" field. Not to mention the fact that there is a "none" option, which, if that were the case, why would someone even be filling this form out?
Specifically, when it comes to donation forms, according to Brad Frost (2014), "Visually speaking, buttons are more approachable, more tap-friendly, quicker, and more visually appealing than a select menu, traditional input or radio button." So, by taking out the radio buttons, this part of the form already becomes more visually pleasing. In addition to this, it would also be a good idea to make the "other" field match the style of these buttons as well.
It has also been proven that by presenting the viewer with multiple donation options, as well as a "most popular" option already selected for them, they are more likely to choose to donate that selected amount. Not only is this one less step for the user, but it also presents a sort of obligation. Frank Barry (2017) furthers this by revealing, "Research has shown that suggesting gift amounts leads to improved donation form performance by increasing average online gift size. It’s a simple concept, really. Instead of asking people to type in the amount they want to donate, give them options. The goal is to get people to give larger amounts than they would if left to make their own, unaided decision."