To avoid wasting your crawl budget on low-quality pages, you can apply a flat website architecture, avoid orphan pages and duplicate content, prevent crawling on certain pages, update old and write new content and reduce error pages ²³.

Source: 
(1) Crawl Budget Management For Large Sites - Google Developers. https://developers.google.com/search/docs/crawling-indexing/large-site-managing-crawl-budget
(2) Crawl Budget Optimization: Stop Wasted Crawl Budget | Victorious. https://victoriousseo.com/blog/crawl-budget-optimization/
(3) How to Optimize Crawl Budget and Crawl Rate for SEO. https://www.linkedin.com/advice/0/how-do-you-avoid-duplicate-content