tiktok compressing edits

im lowkey so tired of tt compressing my edits to absolute shit. theyre under 20 mbs and i tried several render/handbrake settings im just sick of it. i really enjoy editing but once i post it its just it either drops to 30 fps, looks choppy or the quality is just utterly bad. i tried several different methods. tried to upload on phone and pc and it just wont work out. they need to fix this its honestly really fucking annoying. spending 10 hours a day editing just to end up having it ruined once u post it on tiktok. i dont understand how people are able to post their edits in high quality and trust me ive tried EVERYTHING.