Need Advice on Improving My Codebase: Increased Readability and Error Management

Good evening everyone, I have tried to make changes to the code by handling errors, removing unnecessary buffers, and following SOLID principles. Overall, performance hasn't improved, but the code's readability has increased, and I think it will be easier for contributors to understand and make edits. Are there any gurus here who can take a look at my crappy code? Here's the repo with the code: https://github.com/evgenyigumnov/cblt In short, who can throw some crap on a fan advice on how to seppuku improve the code and where to go to the forest develop further. Thanks in advance for the answers...