Based on the information provided, it appears that your 2010 F150 with the 5.4L Triton engine is experiencing a rough idle during ignition and difficulty starting. The engine codes P0172 and P0175 indicate a system too rich condition in both bank 1 and bank 2.

Since you mentioned that the Mass Air Flow (MAF) sensor is new, it's possible that the issue lies elsewhere. Here are a few potential causes to consider:

1. Fuel Pressure: A faulty fuel pressure regulator or a clogged fuel filter can cause excessive fuel delivery, leading to a rich fuel mixture. Check the fuel pressure using a fuel pressure gauge to ensure it is within the manufacturer's specifications.

2. Oxygen (O2) Sensors: The O2 sensors monitor the oxygen levels in the exhaust gases and provide feedback to the engine control module (ECM) for appropriate fuel adjustment. If the O2 sensors are faulty or contaminated, they may cause the ECM to deliver excess fuel. Consider inspecting and possibly replacing the O2 sensors.

3. Vacuum Leaks: Vacuum leaks can disrupt the air/fuel mixture, causing a rich condition. Check for any cracked or disconnected vacuum hoses, intake manifold gasket leaks, or any other sources of air leaks.

4. Fuel Injectors: Malfunctioning or stuck-open fuel injectors can continuously deliver more fuel than necessary, resulting in a rich condition. Consider inspecting and cleaning the fuel injectors, or replacing them if needed.

5. Engine Coolant Temperature (ECT) Sensor: The ECT sensor provides feedback to the ECM about the engine's temperature. If the sensor is faulty and signals a colder engine temperature than actual, the ECM might deliver more fuel, leading to a rich condition. Verify if the ECT sensor is providing accurate readings.

Additionally, it's worth checking if there are any other related trouble codes present in the ECM, as they might provide more insight into the underlying issue.

Please note that diagnosing and resolving car issues can be complex, and it is always recommended to consult with a professional mechanic or take your vehicle to a trusted repair shop if you are unable to diagnose and fix the problem on your own.