Welcome back to blogging! I myself is maintaining a blog, and it is so hard to put out content regularly. Life happens, and I can't just prioritize blogging. It has to take a backseat for a while so I can deal with the other things that are going on in my life. A lot of thought goes into creating content because I have to make sure I am putting out information that are interesting and helpful to my readers. As for the "trolls" they are part and parcel of the Internet and social media. Short of disabling your comment, all you really can do is moderate the comments section to delete unwanted messages. I hope this helps.