Criticism may not always be a negative aspect depending on the context it was given in. Criticizing presentations can help with getting valuable feedback in areas where you may haven't thought of or forgotten to touch upon while presenting. It might be helpful to think about criticism as a purpose for making improvements. Any feedback given can help with strengthening your skills of presenting while finding alternative ways to get a message across. It is important to not overlook the feedback given or take it personal by your audience because this can help with preparing for future speeches and presentations.