I almost expected it 
I recently learned that if you have only one burst, ESD is not of any use.
Did you see the snap2stamps tool? It basically does what you need, namely coregistering multiple slaves against one master and creates an interferogram which is then debursted. Snap2stamps package: a free tool to automate the SNAP-StaMPS Workflow
The only thing you have to do is to process a master (TOPS Split and Apply orbit) and define the swath and an AOI in a config file. Python does the rest.