Photoshop: My "select subject" experience is very slow/poor

Please excuse me tagging onto an existing thread, but over at 
https://forums.adobe.com/thread/2442036
a user describes that they are lacking the feature altogether after updating and screenshots seem to support the claim. 
Do you know whether there are known issues that would be able to cause this?  

That customer does not have an active membership. I suspect he's using a crack of a build without the feature.

Thanks!
I would not have thought of such an issue ... 

thank you hanna. here is the pasted information:
https://drive.google.com/file/d/1auDQE1WXsA9-r9B1BxENNYOC7Z_bxddb/view?usp=drivesdk

Well my membership is active and I agree the select subject feature is pretty weak. Also there is no mention in help so .. you don't know if you are doing something wrong or it's just a half baked  function.  I get much better results with the select and mask tool even if it does take a few more clicks.