Intellifi (Canada) Intermediate Software Developer interview questions

Interview process is really pain in this company. They took total 4 rounds. 1st interview was HR, took 30 mins then 2nd technical with hiring manager took 1 hour, 3rd round technical took 1 hour, 4th round at Markham in-person took 1.5 hour. After 2 weeks, I got rejection without feedback. I requested the feedback but they denied. I spend so many hours on the interview and they simply so NO. I think there is budget issue.