What does too little too late mean?
If you say that assistance is too little, too late, you are being critical because you think that it came after it was really needed and more assistance was required (e.g., “A team of workers arrived earlier today to assist with emergency flood protection, but many local residents, who have been calling for help for days, feel that the response is too little, too late”).
QuillBot’s free Paraphrasing Tool can suggest alternatives to the idiom too little, too late that fit the specific context of your text.