Low open rate even after verifying domain

Low open rate even after verifying domain

We have successfully verified our domain but still we are facing low open rates. I was told by the support that open rates will boost up after the domain verification. We usually have like 50-70% on mailchimp using same content, data and subject lines. We are not trying anything new out of the box here so there shouldn't be any problem with our data set, content or subject line. Please find attached screenshots for the reference; one of them shows overnight open rates using MC.

I have been following on support with this issue for more than 2 weeks now and still my opens are like ~20%. I have read a lot of complaints regarding this same issue. some of them are more than 2 years old but still same issues.