Coolblue Javascript Developer interview questions

I applied carefully and filled application form with all details. - And i got email for hr call and we make it after 1 week application. - Hr call was just a standart call and it was good. - And second interview was call with Engineering manager and HR. Actually it was a meeting that company wants to learn more soft skills about you. Are you fit to company culture? It was also easy and good. - Then i got the frontend assessment and it was easy to do. In assessment email and readme file they said to limit myself to 4 hours for development. I really wanted to this company and limited myself to doing it 4 hour. - And i completed project with all required features like accessibility, responsive. I also used semantic html elements, all accessibility items. Then i tested with lighthouse, NVDA,JAWS and Screen reader. In my opinion project was senior level. - I entered technical interview with 2 seniors. And they asked me first about frontend and its future i told my ideas. Then i shared my screen to them. They didn't ask me too much questions and they didn't talk with me too much. They found small mistakes like tabindex usage, and h1-h2-h3-h4 usage and order. I used h2-h4 and they told me to it needs to be h1-h2 or h2-h3. - Then we switched to javascript side. They asked me question mark element what is it doing? I explained. - Then one of the developers asked me why used nesting in scss and i explained. - Then interview finished. I guessed i got the offer. Because it was just 40 minutes (10 minute meet, 10 minute my question and 20 minute interview). And they just told me h1-h2 and tabindex mistakes. So i was waiting good results. - 1 day later i got call from HR. HR told me to you are not good in HTML basics. I shocked when i hear this. - Because i just made 2 small mistakes. I used semantic, utility first classes, i used role accessibility features everything. But they are telling me to i am not good at basic. Actually it was just excuse. In interview and feedback as you can understand they didn't give me to real reasons. I explained everything with details because i really wanted to work this company. I had 5 days to preparation to technical interview and i worked maybe 5-6 hours after work in everyday. I was waiting questions but they didn't ask me any question about frontend related. I hope they can make better this process. Because if they say me to we choose different person i could say ok.