Just a little Python function which scrambles words like that first and last letter are all you need meme.

scrambled-words-meme-disprover.py

from random import SystemRandom
rand = SystemRandom()
def scrambler(txt):
    """Disprover for that meme about letter ordering in English."""
    words = txt.split(" ")
    result_words = []
    for word in words:
        shuffled = [c for c in word[1:-1]]
        rand.shuffle(shuffled)
        result_word = word[0] + "".join(shuffled) + word[-1]
        result_words.append(result_word)
    return " ".join(result_words)
    
print(scrambler("""This meme isn't true and the examples given always use a relatively simple 
sentence with simple composition. There's just not much mix up in short words, 
whereas once you start extending it to longer words or more complicated structures things get unintelligble fast."""))