Yes, the ending was very weak IMO. I thought the film was average to begin with but the plot was tied up far too neatly.Plan 32b obviously went into action.
I liked the film, but the ending required her to fail in a quite specific way, things going wrong (or even right) in any other way would have ruined the end game.
So you end up with multiple contradictory plans based on different failure points.
Much like heist movies.