Your photos are very nice, don't be depressed. But to answer your question, photos with models seem to sell very well. One of these days, I will have to hire 25 high priced super models to pose for me, and have them wear business suits and medical outfits .... then have them pose all crazy sort o' ways.
- 35mm 2.8/f II L Lens
17mm TS-E 4.0/f L Lens
50mm 1.2/f L Lens
When you see other photos with tons of downloads be sure to look at the upload date. Some of them might have been up for years. Some might have been for assignments (automatic 100 downloads). https://www.dreamstime.com/Zazen_info
You've got some really beautiful photos in your portfolio. I think you would benefit from checking again and improving your keywords, it seems to me that some important words are missing, not giving you all the exposure you could get. Also many contributors are experiencing a slow down in sales at the moment.