YOU SAID:

Pewdiepie isn't better that t series

INTO JAPANESE

PewdiepieはそのTシリーズよりは良くない

BACK INTO ENGLISH

Pewdiepie is not better than its T series

INTO JAPANESE

Pewdiepieは、そのTシリーズよりも優れていません

BACK INTO ENGLISH

Pewdiepie is not better than its T series