I think "she" kicked the bucket....

2009 Charger SXT with 3.5L V6 high-output motor, 250K miles. Had a bulge/small crack in the radiator tank last week, which was repaired and has been driving "normal" until today. Previously had fuel injector #2 or #3 replaced in oct/nov 2025. Immediately after replacing the fuel injector (like 1 block from mechanic) check engine light came on but car drove fine for 45 min then suddenly lightning bolt symbol appeared, car began jerking and losing acceleration-went into limp mode. left it parked for 24 hours and discovered alternator was bad so it was replaced. upon inspection further the EGR valve (?)/vaccum line had a crack-was "repaired" and check engine code produced feedback of fuel issue in the fuel injector that was replaced. mechanic did a reset and all was good. Jan lightning bolt is back randomly at random times requires car to be shut down for 2-3 min then runs fine. no check engine light at all. last week the radiator had the crack which was repaired and things were "good". Today out of nowhere the temp gauge navigated toward the Hot side but never fully got to the hot indicator and mmediately returned to normal/mid section. within 15 min of this car suddenly began stalling/sputtering, rancid burned smell appeared super strong (like burned oil/burned gas), acceleration decreased and would not accelerate but RPMs would go up, car began stalling more and dies and is smoking. 30 min after it dies hood is opened and oil is all over and smells like gas. attempted to try to turn it over refuses to start makes a horrid noise, gas spews from up by front injector and oil is leaking from somewhere unable to see fully.
Hopefully thats enough detail-forgive me im a girl who knows nothing about cars! I think "Bessie" kicked he bucket but if i can fix it id like to....also, does have a squeek/weird noise when first start driving but goes away in a couple min (roughly 1-2 min) sounds like squeaky bar turning or nails on chalkboard.