A little left of your blue circle looks to be the front subframe? If so, its bolts are generally very good to lift from.
There's a LOT of weight in the firewall area, if you can lift six inches closer to the front bumper you're putting less stress on the chassis.
If I were to guess, that brace you used is an engineered part of the car's crash protection. Sometimes they're meant to be really strong, others- really weak, with break-away bolts. Since it's under the driver's footwell I guess it's there to add strength.
Finally, whatever's on the right side looks like it's going to trap salty water. See if you can lower it, clean it, and spray with fluid film.