Dear Khun Karn,
Since you have resigned and will starting a job elsewhere. I thought it would be nice, being that I am older and has seen a lot of people develop in different ways, that I can give you advice to help you advance your career.
If you want to be able to get pay increases, a better future, the route to success is “Putting the Extra Effort” and “Flexibility”.
My boss once explained to me. If a trainee works like a trainee, he will always be a trainee. Only once the trainee works like a manager would he get promoted.
So same with any job position. You want more for life and yourself, you have to put in the extra effort. It would not go unrecognized anywhere, you would will then be rewarded.
I really do wish you the best of luck in your new place n aka.