Actually there is, since DnD follows manichean rules. According to Wikipedia, DnD evil is "[...] harming, oppressing, and killing others. Some evil creatures simply have no compassion for others and kill without qualms if doing so is convenient or if it can be set up. Others actively pursue evil, killing for sport or out of duty to some malevolent deity or master."
I think a more free form RPG might suit you better.
Well, it follows manichean rules, there was no argue about that, but that doesn't mean there is no way to change your alignment. There are ways to do it prescribed by rules, either voluntarily or being forced to by the DM. You can't state that you are lawful good in alignment, act like you are chaotic evil, and expect your DM to allow this dissonance - you would most likely be switched to a chaotic neutral at best. BUT there is also a possibility that your DM WILL tolerate it, if you explain your actions from another angle. Therefore the alignment system is just a simplified ruleset to help the players understand the world and build their character, not a set of restrictive rules that keep you within boundaries.
Therefore, I don't need to find another game to suit my needs, because DnD gives me everything I wish in terms of roleplay and world interactivity (ofc having a great DM friend helps a lot as well). BG3 also suits me just fine as it is, with a lot of combinations of actions/counteractions to play with.
