Analog Devices Senior Software Engineer interview questions

3 different techical interviews with different technical people, each has lasted 45 mins, interviews were online, interviewers were in different domains, questions were not so hard, hands on programming was easy, ı couldnt get any feedback either positive or negative, sent an email to interviewer after 3 weeks and couldnt get any feedback as well, it is so rude also shows that there is a toxic environment in the company

First, a 1hr interview with the hiring manager. Then, a 7hr interview with their team. Got positive feedback during interview. Super slow in responding. Had been a month and no response yet!! Not sure what they are doing. They should reject and not waste their and my time!