Am I Underpaid for My Role in Programmatic Advertising?

Hey everyone, I can't shake the feeling that I'm being underpaid given what some of you have mentioned about salaries. I think I didn't do enough research to know what a fair salary ask would be. Currently, I handle all of the video (YouTube+CTV), audio, and display ad purchases in DV360, managing a few million dollars in monthly spending. I consistently meet my ROAS targets and I'm always seeking better performance. In addition to managing these buys, I'm responsible for strategy and quarterly testing. I regularly meet with the executive suite, typically two or three times a week, including a mandatory weekly reporting call that lasts over an hour. I also manage creative management/trafficking for all non-search activities, including training on CM. Essentially, I run everything solo, have no team under me, and report directly to a director or the CEO. Moreover, I assist with major client pitches, creating PowerPoints, conducting research, and so forth. After three years, my yearly salary was recently increased to just over $90K. Am I being underpaid? I'd really appreciate your insights before I start training new hires.