Italians are shocked (and more than a little horrified) at the quantity of garlic Brits use in things. One clove, quartered, shown the oil then lifted out once it's slightly infused is the norm
Well, there's been class based prejudice against the food poor people eat forever. Garlic is one of those things that gives low quality ingredients good flavour and also has medicinal qualities - Culpepper gives many uses for it;
Government and virtues. Mars owns this herb. This was anciently accounted the poor man’s treacle, it being a remedy for all diseases and hurts (except those which itself breed.) It provokes urine, and women’s courses, helps the biting of mad dogs and other venomous creatures, kills worms in children, cuts and voids tough phlegm, purges the head, helps the lethargy, is a good preservative against, and a remedy for any plague, sore, or foul ulcers; takes away spots and blemishes in the skin, eases pains in the ears, ripens and breaks imposthumes, or other swellings. And for all those diseases the onions are as effectual. But the Garlick hath some more peculier virtues besides the former, viz. it hath a special quality to discuss inconveniences coming by corrupt agues or mineral vapours; or by drinking corrupt and stinking waters; as also by taking wolf-bane, henbane, hemlock, or other poisonous and dangerous herbs. It is also held good in hydropick diseases, the jaundice, falling sickness, cramps, convulsions, the piles or hæmorrhoids, or other cold diseases. Many authors quote many diseases this is good for; but conceal its vices. Its heat is very vehement, and all vehement hot things send up but ill-favoured vapours to the brain. In coleric men it will add fuel to the fire; in men oppressed by melancholy, it will attenuate the humour, and send up strong fancies, and as many strange visions to the head; therefore let it be taken inwardly with great moderation; outwardly you may make more bold with it
If you take it far enough back, this heavy use in the British palate probably originates from our original source of the taste being from Wild/Bear Garlic and Jack by the Hedge/Garlic Mustard, which are native to Britain (and means we've probably been eating things with a garlic flavour for thousands of years in truth). Fresh Bear Garlic will knock your socks off compared to 2-3 cloves of bulb garlic. However, it's also totally seasonal, whilst bulb garlic will keep all year round.