I do think they make quite a few crap cars year on year

and loads have engine issues past and present, GT4 RS was a underdeveloped car and was a bit crap. thing is still better than the other cars out there, does not make it a great car because it's better than a Lotus though !
But we had years of IMS crap engines, then 991.1 crap engines, then 991.1 1st gen crap EPS, then 991.2 Turbos blowing up every where, now PADM failing on all 718 Platforms, GT4RS poor suspension, so don't give me the owner ship Hype :-0 end of the day you don't own a SRS or a GT4 RS ! that is the "fact" here. so something IS STOPPING YOU ! where I have been there done it and told you it's a bit crap
Now due to all these issues costing Porsche millions they have just changed the warranty, so that's also now crap and it was the best out there ! dealers are all crap, customer service is crap.
car prep is now in the main crap, they only prep a car if you find a fault these days and spend zero on prep. last 4 2nd hand OPC cars I been to see have been shocking poor quality. They will fix the issues, but in the showroom the car are substandard.
The thing is when they do make a nice car you cannot buy one unless a VIP or overs and then the best cars they do make are amazing icons and worth putting up with the crap.
Ferrari treat you much better imo and you don't find a crap prepped car in a show room ! , but I don't want one of those. Out the 2 cars you own you WILL have to have turbo's if you actually drive them or maybe already have had new ones. (two friends have Ferrari, they seem to get treated like kings, and the events are top tier)
Why did you sell the GT cars if they are that awesome ? I tend to keep the best models longer term. Hence I have a 997 manual GTS in the fleet an amazing car, why would I sell an amazing car ? before that I kept my 987 Spyder 11 years, only sold that to get the 997 GTS as it was maybe 1 of 4 in this spec and mint and did not want 2 2010 cars. If i say some thing is awesome, I tend to keep it very long term.
I ways have a GT car in the fleet, you seem to have sold your awesome ones lol.