An employer will most likely see your internship the way you see it.
If you say that you learned a whole bunch of things that you would not otherwise have had an opportunity to learn, and practice and you can enumerate the non-financial benefits to you from having gone through that internship, and the things you learned are of value to your prospective employer, then that's the way your prospective employer will see it - Not everything that's worthwhile is reducible to just salary, stock options and benefits.
If you say that you took that internship because you couldn't find anything better and you didn't care about learning anything, that's the way your employer will see it.
The way you shape your narrative about your internship experience is most likely how your prospective employer will see it, because as far as your prospective employer is concerned, it's the path of least resistance and the easiest way out for them to depend on your narrative for what you experienced and learned.
You can say that you expected great things from making a financial sacrifice and going through that internship, and the sacrifice did not pan out. Or you could say that you learned a hell of a lot that you would not have otherwise learned and the financial sacrifice was more than with it. Either narrative is legitimate, as long as you expound that narrative with strength, integrity and with no regret or apology. It's all up to you.
The worst thing you could do to yourself is dodge and weave and be diffident, apologetic and insincere. If you do that, then you just created that special hell for yourself.