You could use the free 3rd party site runalyze.com, which syncs with your Connect account.
From runalyze, select your profile pic (upper right hand corner) > Export Data > Actvities. This will give you a big CSV with summary data for all activities, including columns for "rpe" and "subjectiveFeeling".
Or you could export the original FIT file data for each activity individually (from Connect website, navigate to activity, select profile pic in upper right hand corner, and select Export File). Once you have a FIT file for an activity, you can view all the details using fitfileviewer.com.
