Do you also have a hard top? If your front doors are off by this much, I'm sorry to say that the top is also unlikely to fit. This is wild speculation, but I suspect that your tub came from South America. If it were an unmodified OEM tub, bolting the tub to the firewall wouldn't result in this big of an alignment issue. I could understand if it was off a bit higher up on the door (i.e., the tub was installed too high in the rear somehow, causing the opening to be out of square vertically). But your door is way off at the bottom too. It seems pretty unlikely to me that the prior owner didn't know about these issues, but what's done is done and you have to move forward. More zoomed out pictures of your tub (inside and out) might help us figure out what's up here.
When folks say you will have to ruin the paint job I think they're saying you're going to have to do some cutting, grinding, and welding to fix this if it's as bad as it looks. We're not talking about minor nicks or sanding- this is a major surgery situation. Although you could try to adjust the hinge mounting plates inside your a-pillars, it doesn't look like you can move the doors forward enough to resolve this.
I think you're at a really important decision point here. I would really seriously consider taking the advice to run it without a top and doors. If you don't want to do that, which is certainly understandable, you need to brace for a multi-year project (assuming you have a day job and a family). It may sound like I'm being dramatic but trust me, I'm not- I'm 5 years into my resto- life happens- vacations, family stuff, busy spells at work. You have to put lots of hours into a project like this. I really wouldn't go down that path if I were you. If your tub is a crappy south american unit, you honestly might be better off finding a decent used tub (easier said that done, to be sure) or getting an Aqualu aluminum tub.
Sorry, man. Not a fun situation. Another vote for just going topless with no doors. Good luck