Just had my renewal reminder.. what a shock ! gone up by 25%..

This after getting a tiny refund for the past 2 months when I changed from C4 to a DS4
Done the shopping around thing.. only one came close , others were up to 50% increase..WHY ?
Have to be real careful too.. many things are now deemed 'extras' and chargeable..so the cheapest does not even give me the cover I already have..
Maximum no claims bonus.. no claims.. multiple policy discount, etc etc.
Queried with insurer.. who simply said nothing you have done , insurance generally has gone up due to claims/ area/ type of car and the risks their system projects..
The fact that everyone else is quoting even higher premium, would suggest its a general issue..
I anticipated a slight increase for a better / newer / more expensive car.. but 25%+ is taking the pee..
Regrettably a necessary evil, insurance.. but I can't help feeling ripped off.
Am I alone.. or have other DS4 owners getting increases too ?