I put mid-roll ads on my videos. I personally don't mind them if they're helping out the YouTuber I'm watching. I find it selfish to hate or dislike YouTubers for putting mid-roll ads in their videos when they get to see their videos free of charge. People pay to watch channels on the TV, and still get mid-roll ads, whilst on YouTube, it's free to watch videos from your favourite content maker so it's unfair to judge channels negatively when they use mid-roll ads in their videos.