Great Britain never does seem to exert a great presence in Europe in the vanilla version of WW2G.
It does seem incongruous for battlewagons to survive on such a repeated basis. The Golden Twinkie is always a threat.
Maybe revising the Swordfish attack and lethality factors may curb any extreme situations of the ease of RN demise.
My usual strategy as Great Britain is to let the KM sortie and attrit them on the way up the North Sea with destroyers, subs and cruisers. Home Fleet hits them off Edinburgh/Rosyth - attacks by the Fleet Air Arm intensify, heavy cruisers bombard, destroyers go in with torpedoes, the battlecruiser squadron rakes them and then the main battle squadrons go for the kill. Mop up supplied by the RAF. End result: No one screws with the Andrew on home turf.
Courageous, Glorious and Ark Royal then sent to the Med along with the QEs and Royal Oak, and a large portion of Countys. Nelson, Rodney, Renown and Hood remain at Scapa and Edinburgh, with Repulse off to the Far East.
The RM is attrited by its clashes with the MN and by airstrikes concentrating on heavier units. Force H heads for Malta and rendevous with the Mediterranean Fleet. Resultant battleforce operates against RM in Eastern Med, where basic tactics whittle down the enemy numbers.
Once the reinforcements arrive, all force combined and begin to hunt down remainder of RM and bombard the Italian mainland and North Africa. In the latter case, the sheer concentration of bombardment enables a swift advance by the Western Desert Force. Indeed, convoys with 2AIF onboard can be diverted to Malaya.
Once the Med is in hand, QEs go east, along with 3 Rs. Hood and Renown leave as KGVs come online, and these also head east eventually. Significantly, Force A, as the Eastern Fleet has been dubbed by me, does not venture beyond Trinco before the entire carrier force, loaded with effective fighters, is ready to go.
There is no real pressing need for a maximum effort in the battle of the Atlantic, with no vital convoys coming from Canada and particularly the United States. Those which do need to get through have heavy destroyer and cruiser escort, along with a battleship.
Therefore, it is not outside of the realms of possibility to do quite well as Great Britain, given that the main weapon of the KM does not sit astride the national jugular. Pity.
The IJN never seems to deploy in an ultra-aggressive manner, although this may be only personal anecdotage.
Luftwaffe is still a threat, but countered by heavy Spitfire concentration and flak placement; nothing existential. It does not establish aerial superiority, and there is no KM to attempt any landing operations anyway. A BEF is slowly built up, along with anything that can be put aside for Bomber Command.
Further fortresses and strongpoints would at least slow Jerry down in the east.
Coastal arty and allied mines may also have an effect.
The RM need some sort of aircover, as it is incongruous for heavy naval bombardment close in very early. An attack plane with a limited range and no rebasing, along with a similar fighter type may go someway as to ameliorating the situation; I know not.
To get the IJN and IJA more active in the SWPA, perhaps preplaced landing forces. It's very ahistorical, but under the limitations of the alliance and war system, provides a good kick off.
What it comes down to is limitations of the AI, and this is something that we can slightly compensate for, but not change. Such is life. But this mod provides a great platform for the tinkering.