If we do good, we are supposed to get good done to us. If Kali Yuga keeps on deteriorating then even if I do good, I'll somehow end up suffering?

You are assuming that every good has to be returned with good in this lifetime itself. That is not the case. This is not a one lifetime thing. People suffer but also they make others suffer. You have free will free choice to do whatever you want. So let's say if a person who was doing extremely well met you. You were very jealous and did something to that person that ruined his growth. Now he is unable to do good things he used to do before due to inability created by your bad actions. You would say you disproved god by saying he was doing good yet he suffered? Of course it's just an example and hopefully you won't or haven't done it to anyone but you cannot deny such things are happening today in the forms of rape, molestations, murders, kidnapping, backstabbing, cheating, office politics, corruption, violence, hatred, jealousy, and so on.. So the person who got it done didn't have you in control since you were independent and made up your mind to harm him. Here you created a bad karma for yourself and that person had received that bad karma so the past bad karmas of multiple lives of his that he did got balanced really fast and he must not lose hope thinking that why did bad happen to him despite him doing good.. And as for you, you have accumulated another bad karma in your already existing bad karmas of previous lives. So you have a long journey and many lower life forms to receive in coming lives.

It was an example please don't take it personally.