I don't doubt that you know a lot about this stuff, but you're missing the point.
I think my problem is associated with my save file, for some reason.
I'll reiterate. I've played on my save file using a clean game. I bypassed the loading screen, but I couldn't play for longer than 5 minutes before it crashed.
However, I started a new game, and I could play for longer than that, and it didn't crashed, until now.
I ask you a question, @Fabito48hd: How does changing the dinput8 extension solves the problem? I've tried the game in a factory state, making that solution completely pointless, in this case.
I'll repeat this too: I've done these tests with those DLCs activated, and I could still play a new game, nonetheless.
Also, my PC is completely capable of running this game. I've played this game for more that a thousand hours on the same system, and my game never crashed, aside from those times I've installed conflictive or incompatible mods, and GTA V isn't exactly a graphical showcase by 2021-2022 standards, to be honest.
@JohnFromGWN, I agree with you with the fact that many players blame companies for their own incompetence at modding their games without caution. It's not the company's fault, obviously. However, what if Rockstar Games is to blame in this punctual case? What if I've tried to fix this game in as many ways as possible, so I can play my old save file, and nothing changed? I think the answer is obvious: Rockstar Games is a crap company that releases untested trash on a daily basis.
If the game works for you on previous versions, I'm happy for it. I'm glad you can still enjoy the game we all love so much. However, I refuse to downgrade my game. Players don't need to accommodate to the unfair things from those companies. If I have to downgrade my game because the new version crashes when I play an existent save file, even if I use a clean copy, I'm sorry, but that's a lost cause for me.
@JohnFromGWN and @Fabito48hd, thank you for investing your time and effort on all of this, but I'll ask you to stop repeating the same solution over and over again. This is probably an unrelated issue, and I don't want to end up like Ouroboros.