Interesting. I've had a 2008 for 4 years now, and I've had similar experience with most of the items listed, but you have a few that are big ticket items I did not expect. You also don't list FNR cables which I needed to replace on mine. I also had to redo upholstery. I also replaced the pump bearings and the pumps are much quieter now.
After doing the math on mine, even paying double on what I have repaired since I purchased I am very far from new boat prices, so the equation worked for me. Sorry it feels off for you, but It's good to have and see every perspective.
Surprised by:
steering helm unit,
Captains seat pedestal (Although I did change mine to a longer one)
full bimini assembly
Expected on 12 year old boat:
Trailer axels/brakes/bunks/actuator/lights/tires,
Impeller housing, (Salt water swelling? what happened?)
engine insulation,
engine hatch struts,
2 speakers were blown but it was a welcomed chance to upgrade,
Bilge pump,
mooring cover,
depth finder, (Mine just failed)
Stainless steel scupper.
Bummer, but not surprising for age, I'll need to do mine next winter:
2 soft spot fiberglass repairs on deck hatch & fuel tank hatch,
Fun to have:
Plus electronic upgrades like Garmin echomap, Kenwood amp, and Sony stereo head unit.
I had another boat for 13 years so I'm used to things breaking and needing more help due to the more extreme operational environment of boats (and crappy quality of some OEM components selected, such as the scupper) If it's any consolation new boats generally tend to need a little shake down before all is totally perfect.
Hope the tide turns for you and you start feeling like you got yours money's worth.