Yes, this is a problem that many people are facing these days, that the cost on Facebook has increased a lot, but the results are not the same as before. The main reason for this is that the competition has increased a lot and every business is running ads on Facebook. But immediately changing to another platform is not always the best solution. I think you should first test the audience, optimize the ad and run the campaign correctly. If the results are still not good, then trying Google Ads or TikTok Ads may be a good decision.