What are the disadvantages of Peugeot 508?

My car is 508 2.3. So far, I feel that it has been used for 1 year and a half. There are three main disadvantages: ① Power has no advantage in 20W class cars (mainly because it is relatively meaty and noisy in the initial stage, but it is good to run at high speed. It's easy to get on at 200 km/h if there are few cars, and you need to step on the lowest throttle if you want power. (2) easy to deposit carbon. Carbon deposition began at 1W2, and it became more and more serious. At first, the throttle delay was serious. Later, I cleaned the throttle at 1W8. They say you can't drive this car gently. (3) The tone of the voice is average. Now B-class cars are equipped with BOSE and single take, and even Sonata 8 is equipped with Infinity stereo. 508 is really shabby, with a thin bass and a narrow range. ④ Navigation practicability and general operation. Other bodies are relatively heavy, and the chassis of the B-class car is solid and stable at high speed. Fuel consumption varies from person to person. My driving computer shows that the comprehensive fuel consumption is 10.8L/ 100KM, but it should be 1 10L or more, which is 80% in urban areas. Other questions can continue to be asked.