Author Page Design Issue

Hello,
I have an issue regarding the design format of my blog post grids. I have made custom loop design for my blog page and they work fine. They design can be seen in this picture ( https://www.mainfilm.tv/wp-content/uploads/2020/blogList.png ).

Also the blog post design can be seen here ( https://www.mainfilm.tv/wp-content/uploads/2020/blogPost.png )
Now the issue is when i click on author name, and it opens the author’s archive page, it loads very slowly and loads all the blog posts in one page. I managed to reduce the excerpt size from a plugin called (Advanced Excerpt Options), i can reduce the excerpt length from there, but still the design grid of the author page looks very bad. I cant seem to find any solution to change this design as this is not any page, and is dynamically generated.
The issue can be seen in this picture. ( https://www.mainfilm.tv/wp-content/uploads/2020/authorPage.png )

When i click on category it shows the blog posts in a small thumbnail type grid which is how i want my author page to look aswell. In this image you can see the category page. ( https://www.mainfilm.tv/wp-content/uploads/2020/categoryPage.png ).

Thank you