United Infrastructure Group Project Engineer interview questions

A recruiter introduced me to the company and after a week he told me they are interested to setup a teams meeting for interview. On the day of the meeting just before 5 min, I've received an email from there HR to reschedule the meeting for another day. the second time the meeting was scheduled , I logged in and waited for 15 min and no one shows up without even a notice if they won't be able to attend the meeting!! After 3 days I received apologized email about what happened on that day and they are still interested to have the meeting. it was scheduled Saturday morning , finally they attend the interview 5 min late from the scheduled time. This experience gave me a clear red flag about the company and clear idea about the low rate by other reviews.