Why are the police cheeky?

I’m a black guy I’ve never had a negative opinion on police since I never had any interaction prior to this happening but today I was leaving King’s Cross station I was coming from up north and I was searched for no reason the told me I looked 17 and they suspected I was doing county lines but everyone tells me I looked way older than my age and I’m 22. When they searched me they touched my private parts and made weird jokes I couldn’t believe it they told me they thought I was concealing drugs in my butt cheeks I was genuinely embarrassed they made me squat and everything can I sue them for this? I never knew police were like this I thought they would be more mature those guys gave me weird vibes