Do you think Facebook/Instagram ads are getting costlier?

Yes. i am now thinking of alternative of Fb Ads

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.