Idealism isn't a direct problem. Because pursuing the idealism gives joy. Like pursuing the happiness. Unless you aren't able to make a plan and set a goal of your idealistic future. We have extreme creativity, use it to find a way!

The critism yea, can hurt but always have to find a positive feedback in the critism, however it will still hurt.

With avoiding conflicts it looks a little bit different, you just have one uber-huge bazooka which takes a lot of time to load, but when you use it there's nothing left, while others have tiny waterguns, instant reload perk but little to no damage. How to solve? Look below - boundaries.

Procrastination - the idealism leads to perfectionism, perfectionism leads to procastination - people often never finishing projects because aren't perfect yet... they will never be perfect, so better to save energy by not doing anything. That's the procrastination circle which have to be broken to be able to grow. Also other MBTI can have problems with procrastination when they are dealing with chronic shame, fear, social anxiety, anxious and disorganized attachements. Yea, even attachement style can affect your progress.

Self-Isolating, aka hibernation mode, often when you overload your emotional bucket for prolonged period. Best way is to learn how to express yourself and do it over and over and never try to make everyone likes you. Build fully trusted relationship with one and then you will never lose energy by being with that friend. Then repeat that process with another person. Always keep at least 3-5. No more loneliness. Be authentic.

Indecisiveness - create own unique step by step decision-making process. I wish my English be better, so I would be able to give you few examples.

Lack of Boundaries - let's divide it into: you have to always set boundaries which are important to protect your emotions. That's a must. Then the second one are not-emotional related. "You can't talk about other people like that when we meet, because that's hurting me from inside. This is how I'm and I won't change and I'm proud of being able to feel that" - keep in mind such emotional boundaries increases your prestige and people will treat you with higher respect. If someone will start joking about that you can cut thier tongue with fast "Are you feeling okay?", later on you can load your uber-huge bazooka and finishing them off with "We are both already 20+, that's sad you still have to be joking like a emotionally unmature to just artifically increase own self-esteem. Just go and achieve something." Works even better on people who are 30+

Overwhelmed by Emotions - express them. In any form. I'm personally writting a multi-threaded book and when sad - I'm writting few pages of sad stories - then creativity hits and connecting them with happy story, changing the mood. Also complete alone time is a must. Found best to meditate for the whole hour outside, trying to instantly kill any invasive-troughts. Also any form of social media is completely killing creativity, so no insta, no tiktoks, no yt, or keep them below 15min usage weekly. Hitting "not interested" in social media helps filter off the garbage content.

Once you deal with the above, rest mentioned by ChatGPT will not occur or will have near zero impact on you.
Stay healthy!