Grant reviews are blind reviews - so you don’t know. Also - and even worse - there is no rebuttal process. It gets rejected without you having a chance to clarify / convince reviewers.

Instead you’d need to resubmit and start the entire process from scratch. What a waste of resources …

It’s the final nail what made me quit pursuing a scientific career path despite having good pubs & PhD /w honours.

Unfortunately it’s what I enjoy the most.