( saying ) you should be grateful for sth, even if it is not as good, much, etc. as you really wanted; something is better than nothing
HALF A LOAF IS BETTER THAN NO BREAD
Meaning of HALF A LOAF IS BETTER THAN NO BREAD in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005