Take this Water Tank model as a similar example:
Gazi Water Tank model

Your model is made mostly of surface features. It has 73 features, and is very difficult to edit (if someone wanted different dimensions).
I rebuilt the model with solid features, and it now has 34 features. And the body is controlled by a single sketch, so modifying the size/shape is quite easy. (see attached image)

In this example, the rebuild time difference is minimal. In more complex models, the difference can be significant.
This recent Question post shows two similar models:
https://grabcad.com/questions/how-to-create-finned-tube-in-coil-shape
One model take 5 seconds to rebuild. The other takes 1,122 seconds to rebuild.

If you work alone, build models however you like. But, if you will ever work with other people on a project, it is very important to build models which rebuild quickly, and have a feature tree which can be easily understood, and edited.

The simplest, and best results will be obtained by starting over.
If you enable the Verification on Rebuild option (tools - options - system options - performance), you'll find Sketch5 has errors. These errors likely lead to other problems in the model.
Sketch 5 is quite complex. This part looks symmetrical, I'd try to model one half, or one quarter of the model.

The feature tree is very confusing. I don't understand why every feature is a surface. Surface modeling is fine, but this model uses only surfaces, which is very odd, unless it is some type of "use surfaces only" challenge.

This model has 79 features, and rebuilds in 80 seconds. Rebuilding this model could likely result in 24 features, and a much lower rebuild time of just a few seconds.

Hello I checked the attached piece and realized that the "fillet10" is before some operations and ends abruptly, leaving an edge dividing the curvature.
To fix the error, remove the "fillet10" and redo it at the end of the operations tree, then perform a second review and only marked an error, and the problem is reduced to a single error, what I did next was to generate another round at the edge that divides the curvature.

Steps:
1- Remove "fillet10".
2- Redo "fillet10" as the last operation.
3- Make a new fillet in the edges of discord (picture called fixed).

note: i dont know if step 3 ruins the model, but it is the fastest way not to make the geometry of the model glitch.