You know the MP who ranted about porn ads popping up on his web pages? And how they should be banned - until it was gently or not so gently pointed out how as re targeting works?
If your experience of TikTok is horrendous is because you are watching/interacting with those horrendous videos - so the algorithm gives your more of the same. It's how algorithms work.
My TikTok is based on what I've searched for/interacted with/watched/people I've followed. So it's horses, animal rescue, dogs, cooking and travel tips. As are the lives - because they are from people I follow.
Takes less than a day to train the algorithm to what you like.
I'm not saying TikTok is a good or bad thing - that's a massive debate but it's worth really using it first before getting into it. (The debate).)