The anti-Trump media proclaimed a “blue wave”, which did not happen. The Republicans did as well as would normally be expected if one didn’t listen to the “Resistance” (and the “Resistance” generally only listens to itself). Given the excessive number of Democrats in the group of Senators running (due to the results in 2006 and 2012, both good years for Democrats), the Democrats should have had lower expectations to begin with.
The bottom line is the government may have to be more frugal since approval of both parties is needed to spend anything, or to change taxes – but that Trump can appoint people he likes to the courts with ease (meaning more originalists focusing on the text of the law, rather than on policy issues).