Where can I find out details about the actual network on which SWIFT banking works?

What I’m primarily interested in: finding out whether Bank A in Country X has a direct SWIFT connection to Bank B in Country Y, or does it compulsorily have to go through Bank C in some country?

I’ve been noticing intermediary bank charges a lot these days and I so hate them for practically doing nothing but still charging USD 40 just as a middleman in a SWIFT transfer (I’m looking at you Citibank). And it gets significantly worse when a letter of credit comes through an intermediary advising bank and they loot off close to USD 200-300 for doing nothing.

Hence I’d just like to find out which banks are connected to which other banks directly, and plan my future business accordingly to avoid these enormous stupid intermediary fees.