After successfully going through a progress some critics emerge out of nowhere and give your work a tongue lashing, they speak that way because they did not see the hardship you had gone through from the beginning, whatever you have achieved is not enough for them.
True encouragement and motivation comes deep from within oneself, that old feeble voice that says keep going, you haven’t finished yet, and there is a lot of work ahead of you. There is nothing more valuable than the inner coach.