[stillworks]

Have a few questions, and some ideas.. may or may not help :) But definitely some food for thought and introspection.

  Lately, I feel exhausted with all the late night meetings thats required of me at work

How long has this been going ? If it has been a couple months then I would recommend waiting it out tbh. In my experience, ideally the anxiety levels eventually fall off in roughly logarithmic decay ie the worst bits are in the beginning and after that it may be possible to find a structure/pattern to feel comfortable in (or another very highly likely outcome is that the frog will get boiled... ie you will decide to leave)

Do these meetings result in some action items at the end ?

If every single one of these meetings result in action items, different ones each time ? Then something is fundamentally wrong (either in the process, or in the software solution or both) that needs fixing and it needs to be established how that can be fixed AND why it has NOT been fixed as yet ? That is where your leadership role will come in handy.

  I feel so burned out and anxious all the time, not because of overwork, but due to a lack of formal structure in my work day.

If you are in a leadership role then I am guessing you are not required to deliver story points by writing code ? The only other formal structure outside of coding, reviewing, merging, testing cycle is sadly... meetings. (Takes me back to my earlier question, are meetings resulting in action items ?)

  I'm thinking of starting out on my own someday

Even that path is not guaranteed to bring structure, unless when Gavin Belson calls and you decide to take the 10 million straight away and reject Peter Gregory's counter (sorry, that is a Silicon Valley S1, E1 reference) and that depends on if you have an idea/MVP worth that bidding... otherwise observing other founders I know personally, they are in for a marathon (possibly triathlon) and the returns/pay-off is a long way in the future and structure not guaranteed.

  and work was monotonous bug fixing, but I felt much more at peace since work was always predictable most of the time

But the pay was average at best ! No one wants that tbh.

I would suggest that try and find out where the inefficiencies are which require these meetings (besides the timezone differences) and use your leadership role to work towards fixing those. If however it is a dead-zone then work towards establishing that is indeed a dead-zone and then leave... don't take an uninformed terminal decision.