For country segment, you can't use contains for by default "Countries" dimension , add your countries one by one by using "equal" and "Or" condition in one segment/filter.

Within the Analytics interface, you must configure your report suite’s Internal URL filters. Failure to configure internal URL filters can either include internal domains or prevent external domains from appearing.

For success events, you need to define the type [counter, numeric, currency] as per requirement and also make sure to select the "visibility" in admin.Please check your settings for your success event in admin. After these changes, you can see the event in workspace. There is no much delay. For real...

Divergent chart is not possible in workspace. Can you share your data request so that I can recommend the chart type.Also, if you have analytics integration with other BI tools, you can create the divergent bar chart there or you can create the chart in excel using Report Builder.  

Hi, Marketing channel visits should be same as Entry page URL (Custom variable). Entry page URL contains unspecified visits. Please check if you are excluding unspecified visits as a segment in your report  if not then check your entry url custom tracking. Visits are calculated on session level henc...