If you are always pleasing people then you will only get disappointed in the end.
You please people so they will treat you nice, so that they will be kind to you and treat you with respect back. The truth is... they will only treat you nice while they still like what is happening. The moment they didn't like any of your moves... they will not treat you nice anymore. You will only get disappointed, you will feel bad and you will think that you've been treated unfairly. But you're the one who started it, you give your power to other people by pleasing them and giving them what they want. You make yourself look weak to their eyes that is why they thought that they can do anything to you.
You please people because you want to get something from them and you think that you can get it by pampering them and giving them everything they need. But in the end, if you find out that they are not willing to give what you want... you will feel bad, you will get disappointed. You will feel that you've been cheated and you just waste your time, money and energy. But you can't blame anyone other than you, you started it, you believe in that idea so don't blame anyone, it is your fault from the very beginning.
If your intention from pleasing people is to get something or be treated nicely then you will only get disappointed. You can't control people's temper or attitude. Yeah, maybe they will be nice at you in the beginning because they are getting something from you. But in the long run, they will show their true colors especially if they don't like what is happening.
Never please people because you will only feel bad if your expectations were not met. You are not here to pretend that you are nice just to get something. You are here to show your true colors and please yourself first before them.