Your ads did not get worse. The pool of people who respond to them ran out. That is creative fatigue, and it is the most common reason a Meta account stops scaling while everything inside it looks like it is still set up correctly.
How to tell fatigue from everything else
Fatigue has a shape. Cost per acquisition climbs steadily rather than jumping. Click through rate drifts down over weeks. Frequency rises, because the system is showing the same creative to the same people more often in order to spend the budget you set.
What you will not find is a broken setting. The targeting is the same. The bid is the same. The landing page converts at the same rate it did a month ago. Everything is fine except the result, which is the signature of a creative problem rather than an account problem.
The usual first move is to raise the budget. That makes it worse, because a larger budget asks the system to find more people for an ad that has already reached the people most likely to respond.
Why new versions of the same ad do not fix it
Most brands respond to fatigue by producing more ads. Then nothing changes, and the conclusion is that creative does not matter much.
The reason is almost always that the new ads are new executions of the same idea.
We count live ads in the Meta Ad Library one at a time. In one skincare account, about 320 ads were running and only around a dozen were images. Seven of those twelve were the same layout carrying the same four word customer quote. In a ramen account, roughly 100 ads were live and every single one carried the same body copy.
Those accounts are not short of ads. They are short of reasons to buy.
If the audience stopped responding to a claim, a new photograph making the same claim will not bring them back. A different reason to buy might.
What an angle actually is
An angle is the reason the ad gives someone to care. Not the format, not the layout, not the color of the button.
A brand selling leggings can run the comfort angle, the warmth angle, the one pair instead of a drawer angle, the people like you have switched angle, and the it does not itch angle. Those are five different arguments. The same photograph can carry all five, and they will perform differently, because they are speaking to different reasons someone has not bought yet.
Most fatigued accounts have run one angle in many outfits.
What to do instead
Stop adding budget to the thing that is tiring and start adding arguments.
Find six to ten angles you have never run. Build a handful of executions inside each one so you can tell a real difference from noise. Put them in at a small budget each and read which argument moves, not which image moves.
Then spend behind the argument that worked. That is the step that lowers cost per acquisition, and it is the only one that compounds, because next month you are testing against a better benchmark instead of against the ad that is already tired.
If you want the arithmetic on how many you need, we wrote that up separately.
If you want to see what this looks like on your account, we build the first batch free. We research the market, your customers and your competitors, then make 40+ static ads and test them. You get them in 24 hours.