That just sounds like a shitty oven tbh. Modern electric ovens also have strong fans and can potentially draw much more current from a high-voltage outlet.
Air fryers are excellent at cooking up enough food just for 1 or 2 people, ovens are excellent at cooking up a family roast
There's a good reason they are popular lol, I can have a side of chips ready in 15 minutes flat versus waiting for the oven to heat up then waiting another 15 minutes for my chips to be ready. Plus heating up an entire oven just for 1 serve of chips is just inefficient
There is a good reason why they're popular, but it's mostly due to the foodie trend. You can cook one meal for one in an air fryer, or like two dozen meals for one in an oven (meal prep, divide, freeze).