How do you know that you have given 200%. One key thing you must always yopurself is that self appraisal can never be taken for granted. In most cases they are only guidelines for your superior to gauge you and your outlook. 20% is a good raise and very few employees get that level of hike.
Coming to your point of your manager offering you more hike when you wanted to resign, is is common practice everywhere. In almost all cases, this issue also becomes an additiopnal outside appraisal of your performance. If the employee is good the management generally offers higher salaries. You should ignore these pinpricks and decide your future based on the outlook and performance of the Company and your immediate manager. Getting carried away by emotions do not help in real life. Since you have already resigned, best of luck.
