Is job hopping bad?

I have been working at my ngo for about 11 months now and I can honestly say I’m burned out and fed up. I have a master’s degree and I’m being paid $17 (USD) an hour while doing 3 people’s jobs under management that is less than ideal. The office has turned into high school with clicks and has a high turnout of staff. Not including my supervisors I’m the most senior person there second to one other who ha only worked there for 2 years and is looking for another job. She said there have been 4 other times in her 2 years that we have had short staff and turnover. I had gotten told that after my 3 month probation I’d be making $21 per hour. Then right before all of the new hires started they said they couldn’t afford to on my grant. I find out today that ALL the new staff make more than me and the other senior employee starting at $20 with less qualifications than us. (The other senior employee makes $18 USD per hour). I was thrown into multiple positions as was she and these new people have one position. I’m also starting the process of looking for another one but, I feel like because my resume has weird undergraduate work study jobs and freelance contract jobs it looks horrible to not want to stay, I’m also not sure I can feasibly suck it up for another year though without going absolutely nuts