unable to play DA:2 and DA:I

i bought dragon age 2 and dragon age inquisition secondhand from a bookstore. i tried to play dragon age 2, and i was stopped by the securom setup thing. i tried to install dragon age inquisition and it wanted me to install origin, but origin was discontinued. i entered my product code for dragon age inquisition on the ea app and it told me it was already in use.

i tried to get a ticket or something from the ea help thing but that didn't work and i'm not sure anymore if i can get an actual human person to help me with this issue. maybe i can keep hacking away at the account support until i get somewhere it shouldn't be this hard to install and play a decade old game.