If you only want people to say your poetry is lovely then only show it to those that you think will say that, but then don’t expect your poetry writing skills to improve either.
If, however, you choose to put your poetry in the public domain then you must expect some to point out where there is room for improvement…constructive criticism. That does not make someone a troll, it makes them someone who cares enough to want to give input. If you choose to ignore it, that is your choice. If such feedback hurts too deeply then maybe you are better off not putting it in the public domain. Or maybe you need to put a statement at the end along the lines of you do not want any feedback, in which case I would ask why are you sharing it?
And if people have stopped posting as they used to in case someone might disagree with them, well quite frankly they need to grow a thicker skin, it’s a big bad world out there.
I would welcome more poetry but I reserve the right to not say how wonderful it is if I don’t feel that way.