Do you think Facebook/Instagram ads are getting costlier?

YES. That's the nature of the game. More competition, less real estate to market to, and voila. The price always goes up if the platform is popular.

i really think facebook and instagram ads arent the thing anymore, new platforms like tiktok outperforme them

If I think too much, then both of them are very good platforms, but I am currently busy in american marketing association. But I would definitely like to talk to you.

Yes, they are. Due to the increased number of advertisers willing to run their ads on these platforms, the cost of running ads has increased immensely.