By focusing on issues that Americans care about and selecting the best candidates, the Democrats were able to maintain control of the US Senate. Democrats honor the democratic process and do not deny the election results like their counterparts on the right. The recent senate races proves that Americans care about women's rights, the democratic process, and fact based legislation.
The Democrats did not win anything by maintaining control of the Senate, the Republicans beat themselves. Former President, Donald Trump used his intra-party weight to support candidates that would not be broadly accepted by the masses and more moderate republicans. The right is going to move on from the Senate, focus on the run-off in Georgia for control of the House, and make sure to remove Joe Biden from the White House.