Faded ink on restaurant bill

I don't know if I was overcharged...the faded bill makes that a difficult assessment. Next time I will demand he get a pen or pencil out and write it all out for me. Kind of a hassle but, sorry, I need something I can read.
And the same waiter that printed out the bill gave it to me.

I suggest that what you would do next time would have been appropriate for what you did last time.

In general, I find it easy to have an idea of what my bill will be, whether in Mexico, the USA, or Canada. It isn’t all that difficult for most people. I would make a particular point of that if I had had “10 or 15 incidents” and one just recently at the same restaurant.

If I don’t understand a charge, I ask for clarification and it is almost always given cheerfully.

From what you describe, it may be just as challenging for the server as for you to make out the numbers on the bill.

I appreciate that it might be in the server’s job to print the bill, but I doubt that it is the server’s job to order the fish, chicken, vegetables, plates, beer, cash register ink, or other supplies. This sounds to me like a complaint that ought to go to a manager or an owner, not a reason to stiff all of the employees of the (likely low-paid) manager or owner.

how much does it cost to run down to Office Depot or the local print shop

I think the nearest Office Depot is in Acapulco, so there would be considerable cost.

Zihuatanejo is not New York City. Some supplies are not readily available. Businesses have been hard-hit by the pandemic. Buying printer ink might not be the highest spending priority at this time.