Sometimes the world appears to be full of grumpy old moaners.
If you post something to an online social media network, where there are "comment" fields. You would do well to accept the idea that other people might "comment" on your post. Either positively or negatively.
If you do not wish to interact with some people. You can modify your privacy settings on most social media networks, this one included, so that only certain people, or particular groups of people, can view and/or comment.
This is part of growing up. Learning how to interact with the rest of the world, in a mature manner, is what we do as part of our lifecyle. Learn how to use your tools.