I‘m angry that my maintenance/weight loss calories are so low

Hi Heather, I really love your podcast and just subscribed. Especially because you talk numbers and give so many examples which doesn’t happen a lot in other resources. I lost weight slowly with 1400 calories per day ( I am 5.5 feet and weight currently 185,2, lost 30 lbs in 11 months. I had some trouble sticking to those calories for so long and according to all the calculators I should be able to eat more and still lose but eating an average of 1600 for 40 days resulted in 0 weight loss and it should have been 4 lbs according to the calculator. I walk every day an hour and do some strength training and I guess putting this into the calculation mislead it, or other I don’t burn calories with movement? My wish is to get to a sustainable calorie amount for weight loss (goal around 150 lbs) and really know it works because not being sure sends me in a spiral wanting to give up. Maybe you have an advice. Thank you