Passat 3B: Weak AFN Engine - Troubleshooting

Hallo, der Passat eines Kollegen ist ziemlich schlapp. ich habe dann einige Messwertblöcke gescheckt (Siehe Anhang) doch konnte ich nur herausfinden dass bei weniger als 2200 U/min zu wenig Ladedruck anluiegt und somit die Luftmasse zu gering ist. But why?
The engine runs smoothly (checked with a diagnostic tool). It feels like a 16V gasoline engine; below 2500 RPM, there's almost no power, then it starts to pick up and stays at that level until around 4000 RPM, where it either reaches its rev limiter or becomes undrivable. It lacks the typical TDI effect. At first, I thought it might be the mass airflow sensor (MAF), but since its readings are up to 950, I believe it's working correctly.
Could someone perhaps analyze the logs and point out something I might have missed?

Thank you very much.

Have you ever cleaned LMM with brake cleaner? It often works wonders .