When I tell people how I'm feeling, they make me feel worse by telling me I'm wrong or to suck it up, how can I avoid this?

You probably won't be able to avoid it because everyone has their own opinion. You can ignore it. You're not wrong for feeling any kind of way. Nobody can be told how to feel regardless of the situation and regardless of what you're going through.

Find one or two people who will just listen without making any judgement or giving advice. 7 Cups is great for that!

First, you cannot avoid it from happening. Second, you cannot please everyone because we are all unique. We do have our own mind, our own way of thinking. its important to say how we feel for a certain situation but bare in mind and be ready for however they will response to what will you say. Feeling worse is not totally a bad thing, sometimes, we do feel that way because they are right,. Feeling worse sometimes made us realize whats wrong with the action we take. Just be firm and stand and face for whatever or however they will response to whatever you say or do and be open-minded. Through this, you can develop urself and u will realize that someday, those things were just little things to think about :) Gudluck! just be bravely positive:)

If you're looking for support only, maybe let them know (when all parties involved are in a state of calmness/neutrality) that when you tell them these things, you're not looking for advice or their opinion. I find that can help with avoiding tricky situations :) good luck!!!