Is the bad history of domains transferred when merging?

Question

Search Engine Optimization

I have a website, I promote it, I use everything and everything for a targeted visit.
There are several domains that are similar in name to the main site, with the name of competitors and just a thematic domain name. I looked at the history through xtool.ru, it shows old links (majestic.com shows), that there are thousands of them. Since the run method has been showing negative results for a long time, I want to know what the effect will be if these domains, which are not very good in history, are glued to the main site.