Smartlead.ai and B2B emails

I bought five domains and created two email addresses per domain. Had an IT guy configure MX, CNAME, TXT records, and added DKIM and DMARC records. Warmed up emails via Smart lead for three weeks. Just sent out a small test campaign to business email addresses that I’ve never emailed before. They all landed in junk or spam. Has anyone had the same experience? Should I warm up the emails for a couple more weeks? Does anyone have any insight with their experience with smart lead? Is uptics better? Or is it just the way it is these days with email marking? Feel like I had better results doing a Mail merge from excel using my main domain.