Some people just want to criticize and tear things down. They believe the world should fit their preferences and other people should live according to their opinions. To identify these kind of people look for the loud, demanding, intolerant, and absolutely certain of their position.
Do not let them tear you down. Do not let them wear you down. Do not let them discourage you.
Most of all . . . never, ever . . . become one of these people. Be the opposite of these people. We all rely on good people like you to outlast and outwork the cynics. Doesn’t matter get better.
Do the work.