Kohei Horikoshi had his masterpiece stolen

By that logic the rasengan is just a copy of gyro’s spin

So, to this extent, would that mean MHA is a copy of X-Men?

it all links together...

No, not at all. You're just delusional.
You know how popular the concept of a super-power family or school is in fictional media?

The Fantastic 4
MHA
X-Men
Encanto
The Incredibles

except mha and encanto are both: all are magical except the main character

Again, another common plot.

So by this logic Pacific Rim is a copy of Evangelion?