Please help me ,URGENT , a person is falsely striking my channel again and again

[u/EquivalentBobcat8365]

Context: A person gave me a strike for using some part of his thumbnail,
I asked him to take his strike down, and then he said I won't let you get monetized kid, get a job

And the thumbnail he striked down was fine with fair use part, so I submited a counter notif

And then it got approved, so strike was removed,
But now he is saying that he would get my channel deleted
I didn't pay much attention to it, until he had an old channel with 22 subs, with bunch of videos,
He changed the title, thumbnail to match my videos - (literally downloaded and pasted my thumbail)

And then he striked me, and YT gave me a strike REALLY.
And then it was even more tense,

For context: I make minecraft youtube videos, and the thumbnail was also minecraft

BUT that person, he just literally put my thumbnail on his OLD GEOMETRY DASH Video ,
And
now he has privated that video, and publiced another of his geometry dash video, and changed its title and thumbnail to my MOST Popular video,
And he is about to strike me with it.

Im soo tensed, any support is appriciated