Stop letting Slack interrupt you. Let people make requests for your team that get stored in Asana.
Avoid the massive cost of context switching created by Slack DMs. Turn requests in Slack into Asana tasks to be handled later.
Finding bottlenecks in Salesforce is easy with Flowdometer, a free tool for time tracking and setting SLAs in Salesforce.
Use Flowdometer to be notified of process breakdowns as they happen
If you're not sure where to start with a dysfunctional team, start with repetitive work. Figure out how things are supposed to work, and where they aren't happening this way.