Performance is low after 30k

1.it is economy in its range 2. Up to 30000 kilometers it is ok but after there is a lag in pickup. Now im driving at 85000 kilometer, pickup almost zero. And cabin sounds are irritating 3. If u r driving in a uneven roads, linkrod stabilizers u hav to replace every 10000kilometers 4 ground clearance is low when ur car is at fully loaded with luggage etc,at speed braker