If you have seen it, can everybody who has just agree how much more sense it makes? The 2003 series’ Wrath is CONVOLUTED AS HELL (SPOILERS Oh, look! It’s a kid who was a failed human transmutation who is actually successful and was sacrificed to the Gate of Truth in a ritual that required sacrifice to make him in the first place and turned him into a weird black baby who took Edward Elric’s limbs to live in our world in an island for years until the Elrics’ found him, and yadayadada END SPOILERS), and the twists at the end are just too much for my brain to process (Parallel worlds? Nazis? Couldn’t Ed just kill himself to return back to Amestris? This doesn’t count as spoilers because knowing the twist before is better than going in blind).
I would recommend reading the original comic of FMA. If you have to watch it, then watch FMA: Brotherhood. The 2003 series surpassed the comic and just wrote it’s own story (which is why Brotherhood was made, in a way).