Im just lost and have no clue where to start...

The car itself performs mostly fine, except if i floor it or just accelerate harder for like more than 15s it goes to limp mode with "engine system requires servicing" showing on screen.

Thought might be something with the egr valve, because on 2-5 gears on 2k-3k rpm the blow off valve kept going off intermittently: builds boost, then blow off valve activates, then again builds boost and so on. Disconnected the egr and helped a bit, removed and cleaned it, helped for a little bit, then the same started happening. So ended up replacing the egr valve, but now its much worse. Even if i dont accelerate hard "engine service needed" shows up but thankfully doesnt go into limp mode, however it also appears after cruising at 100+kmh. Idk anymore. With obd reader i get a million codes now.Car Scanner ELM OBD2
DTC report
Selected brand: Volvo
VIN:

============1==============
P0490
Raw code: 0490
ECU: 10
Status: Pending fault present, Validated and stored in non volatile memory, Validated fault present at time of request
Exhaust gas recirculation (EGR) system - circuit high

============2==============
P0406
Raw code: 0406
ECU: 10
Status: Pending fault present, Validated and stored in non volatile memory, Validated fault present at time of request
Exhaust gas recirculation (EGR) valve position sensor A - high input

============3==============
P0299
Raw code: 0299
ECU: 10
Status: Pending fault present, Validated and stored in non volatile memory
Turbocharger (TC)/supercharger (SC) - low boost

============4==============
P0489
Raw code: 0489
ECU: 10
Status: Pending fault present, Validated and stored in non volatile memory
Exhaust gas recirculation (EGR) system - circuit low

============5==============
P1412
Raw code: 1412
ECU: 10
Status: Pending fault present, Validated and stored in non volatile memory, Validated fault present at time of request
EGR Different. Pressure Sensor Signal too Low

============6==============
P1335
Raw code: 1335
ECU: 10
Status: Pending fault present, Validated and stored in non volatile memory
Crankshaft Position Sensor Circuit Malfunction
Engine Torque Monitoring 2 Control Limint Exceeded

============7==============
P0234
Raw code: 0234
ECU: 10
Status: Pending fault present, Validated and stored in non volatile memory
Turbocharger (TC), engine boost condition - limit exceeded

============8==============
P2263
Raw code: 2263
ECU: 10
Status: Pending fault present, Validated and stored in non volatile memory, Validated fault present at time of request
Turbocharger (TC) boost pressure/supercharger (SC) boost pressure - performance problem

============9==============
U0301
Raw code: C301
ECU: 10
Status: Pending fault present, Validated and stored in non volatile memory, Validated fault present at time of request
Software incompatibility - engine control module (ECM)

============10==============
P0490
Raw code: 0490
ECU: 10
Status: Pending
Exhaust gas recirculation (EGR) system - circuit high

============11==============
P2263
Raw code: 2263
ECU: 10
Status: Pending
Turbocharger (TC) boost pressure/supercharger (SC) boost pressure - performance problem

============12==============
P0406
Raw code: 0406
ECU: 10
Status: Confirmed
Exhaust gas recirculation (EGR) valve position sensor A - high input

============13==============
P1412
Raw code: 1412
ECU: 10
Status: Confirmed
EGR Different. Pressure Sensor Signal too Low

============14==============
P2263
Raw code: 2263
ECU: 10
Status: Confirmed
Turbocharger (TC) boost pressure/supercharger (SC) boost pressure - performance problem
(The egr codes stayed the same after i replaced it...)

Any help is appreciated