Some comments from forum newbie. I’ve played A&A board version dozens of times; and the 'puter version hundreds (no exageration) of times
Quite obviously, the board version of A&A heavily favors Allies.
With British carrier in North Sea followed by US fighters landing on same carrier (all in round 1), Germany is effectively reduced to land-only ops in Europe for the rest of the game. With a Karelia assault Germany’s only real hope, Allies simply take Finland and pour/transport infantry through same and into Karelia.
Whereas the Japs enjoy some fun/expansion in the early game, their required assault on Moscow is too little too late b4 Germany is overrun.
Kicking transport costs up to at least 10 and prohibiting new industry for Allies mitigates the imbalance.
Whereas the 'puter versions could play out the same way, the AI is so weak that the Axis can win easily. That said, the AI fights back w/ loaded dice. Strat bombing and picking off transports w/ planes is generally inadvisable against AI.