Working for family isn’t what one might think

I am a in-law that works for my husbands family. This is the second time I’ve worked with family members.
Let me tell you it isn’t what it’s cracked up to be on either job.
I think that there are pros to working with my husbands family such as getting time off I need or want but most of our employees have that here We are a small company so everyone knows everyone and their business almost. But the longer I’m here the more I see how this business could be run better or maybe just not being blind to the situations around.
I came to this job about 10 years ago with the understanding I would learn the normal day to day office duties and learn other upper position duties.
With in this time I’ve learned very little upper duties , I want to learn and do these things that’s why I’m suppose to be here. With in this time I’ve still making very little money I’ve only gotten one raise since being here and that’s only when I was offered an old job back for more money. Let’s just say I could work at a fast food place or big box store for more money with benefits !
I love my in-laws don’t get me wrong.
I didn’t marry for money that’s for sure because me and my husband don’t have much. We live within our means and have not overspent on anything.
I did maybe expect more than I thought coming into this job I saw the potential to maybe being an upper in this company. 10 years later I’m still doing regular day to day office work nothing more !