1, that's because you are afraid of it and find it difficult to see it. Treat it with a normal heart.
2. That's because you have been influenced by others, and you always find it difficult to hear what others say before you learn.
That's because you don't love it and haven't made friends with it, so you haven't integrated into its world. Mathematics expresses life data according to principles, formulas and logical thinking.
Your basic knowledge is not solid, which leads to the more you learn, the less you learn. In that case, please take it step by step first.
This is your previous failure. You fell over there, but you didn't get up. You haven't got over that psychological shadow yet.