突然ですが ('this is sudden, but') is a polite opener for introducing an unexpected topic. みなさんは ('everyone') addresses the audience directly. 若者から見下された ('was looked down on by young people') uses passive + から (agent). ~と感じたこと、ありますか uses the experience pattern ~たことがある in question form. A good opening for a blog post or talk — inviting, relatable, and specific.