From: Vancouver, Washington
Okay, let's count successes of Betties after PoW and Repulse:
BB:1 damaged (disputed, might be B6N)
CA:1 sunk, 3 damaged
CL:3 damaged (or 4, if USS Birmingham was also torpedoed by G4M on 10/08/43, can't find definite information about the attacker's type anywhere)
A bunch of lesser ships (AV Langley, both APAs lost by USN during the war, a couple of destroyers), I'm far too lazy to count exactly.
That's... a very good tally for a plane of which only 2435 (I hope you realise that this is a quite small number for a plane that also was the main ground attacker and one of the main searchplanes of IJNAF) were produced and which was on the losing side. In fact, I don't think any other purely land-based plane on both sides can boast a comparable list. Add here important operational results achieved by repulsing Allied cruisers at Makassar Strait, and by numerous airfield and port attacks during the Japanese offensive in Philippines, Malaya and DEI, as well as far less triumphant, but still vital for holding the line as long as Japs did, action over Darwin, Port Moresby and Solomons, and I fail to see how G4M career can be considered anything other than illustrious. Impossibility of the odds placed against IJNAF land-based bomber force is a weak reason to condemn a plane's design.
That's roughly the same number of a/c as the Fairey Swordfish with the same record of combat success (approximately). Not too many threads from the IJN fanboys complaining about how the game portrays such an invidious British invention though.
I guess I misspoke about the FAA Swordfish. Before the first RIKKO had fired a single war shot Swordfish had:
SUNK: 4 Battleships (although all in harbor and 2 were raised) and 5 DD with torpedoes along with sinking 2 DD with bombs.
DAMAGED 3 BB (2 underway), 1 CA (underway) and 3 DDs with torpedoes (including crippling hits on the Italian CA Pola and German BB Bismarck which allowed surface ships to catch and subsequently sink them)
The Swordfish also sank many many submarines and merchant ships throughout the war. Seems the Swordfish had a better record than the RIKKO.