SHALOMTOYOU – It is indeed a very common problem, and one should made every effort to learn to pronounce Hashem’s name correctly.
Having said that, Piskei Teshuvos (1: 5: 6) quotes from Nimukei Orach Chaim, that articulating the daled of A-doinoi with a chirik, sounding as A-dinoi, may be acceptable after the fact.
The opinion of Rav Miller shlit”a (from Canada] is that it is OK b’dieved, and one answers “Baruch Hu uvaruch shemo” and “Amein” to such brachos.
However, I do not understand this psak, nor do I agree with it.