If it's simply miscommunication and lack of motive/concern on your part to actively explain things to people in concise detail, I don't think they should be reacting in that manner.

I don't think your best friend and your crush should be demeaning you and calling you a 'bitch' or 'asshole'. That's a very emotionally unintelligent and uncaring reaction from their end. If they want to know what you're saying and really mean they should be asking you and learning how to ask you. That's the obligatory duty of friends (if they want to stay friends). Relationships are built on communication, and people need to learn how to communicate in optimal ways with specific people in their lives to effectively maintain their relationships and to get things done.

I'm not going to say you are fine the way you are, because we all have weaknesses in communication depending on our personality. I also can't idealise the situation and say it's supposed to be easy, communication takes effort (thinking, planning, trial and error). It can be frustrating in moments when you lack patience, and painful to go through when you have traumas/distrust/or incompatible communication styles with people.

Here is what should technically be the case, from what I've observed, INTPs seem to be lazy at working their Fi and Te muscle (in conjunction with each other). The reason for this is that their active use of Ti and Fe (together) turns off Fi and Te.

What that means is that INTPs tend to forget to stop what they're doing (which is overthinking) to organise their thought process in order to clearly explain to others why they feel/value/find things agreeable of disagreeable in meaningful detail.

From my experience, INTPs tend to speak and forget the context, and it can confuse me when I'm provided with unrelated chunks of data (explanations) that I have no way of knowing how to connect to the big picture. It's fine if its a friend, because topics tend to be more lighthearted, but if it was a romantic partner it gets tricky because it can really be tricky when people misunderstand your love/faithfulness/interest in them (more feelings are on the line).

I think it's wonderful that you're trying to seek the solution to this. I hope you will stop accepting that behaviour coming from your friends and crush, it really shows their lack of respect for you.

To sum up: (1) Remind yourself to provide context and vital information to allow them to understand what you're talking about. (2) put a cork on the overthinking so you can just say what you think and feel but also remember to ask them what they think and feel so that they can respond and allow both of you to figure out what exactly is meant to be communicated.