I built this ship at the creative base but I used a modified workbench, dimensions of my modified workbench are 50 by 50 by 150

question which base did you build this ship at? i've even tried the rig.

ill check.

yeah weight blocks should work. Either use them or you can also try building yourself a tracked stabilizer inside your hull with the help of some of the number micro-controllers. That is if you know how to do it.

inside the hull

use weight blocks inside the hull/keel then use unpowered compact pivots