hint : when you google just add the word Arduino.
and you should get results that include using an arduino. in your case, you might find stuff that will help you.
I think what you experienced was a natural law of forums.
the quality of the question = the quality of the answers
the details of the question = the details of the answers
information left out in the question = wrong answer
there is a corolary about insuffient informatin and emotions.
insuffent informaon = negative emotions
sometimes these are reflected in the tone of the response or by the questioner getting upset because the answers do not address what the questioner wants to know.
please read about the X/Y problem this is where the questioner excludes information or declines to use the most direct way to do a thing for some reason only the questioner knows, but that limits the answer to be wrong and often consumes many pages of faulty posts.
May I suggest you elaborate more of what you are trying to do.
what you are using such as sensors and such. using part numbers and possible links to data sheets.
when doing control, probably the least understood and yet most important is the final control element. say you want to heat skiers on a chair lift in the open wind. now, take that same heater and try to control an insulated incubator box.
it is like using a blast furnace to light a candle on a birthday cake.