I wouldn't swap the countryside for anything. The pace of life is wonderfully slow, the awareness of the seasons is uplifting, being away from the ratrace is calming. Give it time and try to adapt, it'll be worth it.
Go to bed early or use earplugs if you can't get used to the dawn chorus of birdsong.
Accept that the sound of farm vehicles is more gentle than 100s of cars, lorries and buses.
Keep the area immediately around the house free of bushes and trees but grow herbs which flies don't like such as tansy, basil, most lemon scented things like lemon balm and sage. Put them in pots or raised beds near doors and windows.
Hang wasp and fly traps around the garden, the pergola or garden umbrella.
Get to know your neighbours and ask for tips to help you adapt.
Sit back and enjoy a fresh cup of nettle tea with new friends.