Hi,
I've helped a lot of entrepreneurs with partner issues.

The fact is that equity is divided in whatever way you negotiate. Rights such as first right of refusal are normally dealt with in the shareholder's agreement.

Certain clauses or rights can certainly be unattractive to investors but these agreements can always be amended. Again, it's what you manage to negotiate for yourself.

Arrange a call and I can help you with the specifics of your situation.

You may find these two videos of mine informative:
This one on partnership agreements https://youtu.be/WvLFlct227o
and this one on share structures https://youtu.be/1EjKjSAd1F8

Cheers

David Barnett