Ramaswamy made a valiant effort, as he started his campaign with little name recognition and outlasted several better-known candidates. He put up a fight in visits to every Iowa county, and brought some important issues to the forefront of the race while building his campaign on truth-telling. By leaving the race and endorsing Trump, he's continuing to do what's best for the Republican Party's future unity and electoral chances.
Ramaswamy never really ran against Trump as much as he ran alongside him, seemingly auditioning for a cabinet position along the way. This campaign accomplished two things: it made Ramaswamy famous, and it proved that the Republican electorate has a hunger for Trump to shift his terrifying policies even further to the right.