Please, masters of the Galaxy of heroes; Lend me your sage advice!!

You have to gear and mod your crew in order to have the ship stats go high.
Character speed means nothing. Quality and level of mods is what you need.
It counts not only the stars and level of the ship.

Read this:
https://gaming-fans.com/2018/05/swgoh-understanding-ships-crew-power-in-galaxy-of-heroes/

Besides, the capital ship you using goes well with rebels but not with the ships you are using.


Cheers