how to interpret the 2sls output?

[Ting1]

Hello,
Since it's normal to get a negative r-squared, or adjusted r-squared using 2sls, what should I look at to see whether it's a good model?BTW, most of my variables are significant and have nice p-value. The attachment is part of the report.
Also, How should I interpret the negativity of the adjusted r-squared?
THank you for your input!