I'm worried no therapist will take me seriously

I honestly have no idea if my problems are "bad enough"​ to go to therapy,​ but I really want to. I want to get my life together​ before going out into the real world (I'm in college). It's just that, when I was 15, something really bad happened to my sibling, and I went to see a therapist because I was having a really hard time, and he told me that the anxiety I was feeling was because I was lazy and didn't try hard in school​​​. I know it's such a small thing, but being called lazy by someone who was supposed to help me at a very hard time in my life made me think that my problems aren't bad enough to go to therapy. And the thing is, he had over 25 years of experience working with kids and teens. I can't help but think that he obviously​​​​ knows what he's doing.

I don't know. I just am so worried about opening up again and being called lazy or told that everything is my fault. I'm worried that my problems aren't bad enough to go to therapy. ​​​​I'm worried no therapist will take me seriously. ​