If I hear one more time from any manager at my company that we’re a “family” I’m gonna vomit

I’m working 2 jobs at the moment, putting 12+ hours/day, been doing for about 2 months and I’m already burned out;
I’m working for a big e-commerce agency which is about to get bigger, doing mostly outdated Frontend work (Magento) with no sign of raises/promotions/ real growth, since all clients are basically enterprise and only want “ol’ reliable” over innovative.
A lot of smart people, lot of knowledge, pay is fair.

The second job I’m doing (part-time) is for a smaller agency in the same sector, pay is a bit higher, closer time zone and an opportunity to work with newer technologies.

I need to make a decision on one of these two companies since I can’t possibly keep working all these hours.
Is there anything else I need to consider before making a decision?

As a Frontend developer I’m getting a bit tired of working with Magento and its outdated tools, but at the same time seems difficult to switch to something different since I haven’t really worked with anything else, I feel a little bit lost