You should always take Criticism even if it's bad. It's how you learn and grow as a youtuber. Sometimes you can ignore some advice that you feel isn't worth listening to, but other times some people may have some very good advice.

Also .. the bold text really isn't needed since being more noticeable only works when your text is between other text. When someone clicks the link to your thread, you already have gained notice. The boldness actually makes the post seem less attractive then it would have if you left it be.

That doesn't mean you shouldn't listen to their advice, which was perfectly valid. If you are just looking for people that would subscribe and not give you constructive criticism, then you probably won't succeed.