A-N-G-S-T is always pronounced like ‘gangsta’ for you, me, and regular Americans. Only in the boardroom of Merriam-Webster and certain parts of Houston do they give a flying foxtrot about being technically correct while sounding British and faggoty.
In the future, when I see that word, I’ll be singing to myself “Damn it feels good to be an ‘Angst-a!’”