Your Russian Dragon Fruit looks to be growing about the same as mine was a few months after planting. I have tried to see it through your eyes imagining trying to grow green peas (Pisum sativum) during our Florida summer with temperature of 35C and near 100% humidity. I would have to seal up my shade house, install air conditioning to bring down the temperature and humidity, and make sure none of that ever failed all summer long. Even one day of failure would be the end of my pea-growing. Good luck to you.