I don’t use nearly that much oil - 3 or 4 dessert spoons in 600ml, plus some water
What I’ve find *does* make a big difference is using dried as opposed to canned chick peas
Of course, it’s a faff soaking them overnight, then cooking for 2 hours, but the canned ones have quite a different, almost leathery texture when I cook ‘em, which I think explains the dryness you describe