I seen blayada Yada Yada.
That is not a sentence. There is no such thing.
It's either I've seen (I have seen) which means you saw something in the past
I've seen that guy before.
I saw (please don't say I've saw) means you saw something in the past recently
I saw him yesterday.
I see (you see something now, or you see something on occasion)
I see a doctor for my erectile dysfunction.
I see you!
Jfc ppl it's not hard! I imagine back wood hicks named mary jo or billy bob living in trailer parks when ppl speak that way.