A troll is someone who is posting/commenting in order to get a rise out of people.
Admittedly, it seems a first post like this would be best in the “Ask an apologist” section but that’s hardly a punishable offense.
Others with more knowledge of NFP may be able to direct you towards specific techniques that may work out better than whatever it is you are doing.
Also, keep in mind that going to confession and just expecting your sin to be forgiven is the sin of presumption. Knowing that a vasectomy is “unnecessary mutilation” implies some basic understanding, although I’m not you and can’t know for sure.
