peekaboo knows that noone's taken booster shot 5, let alone 25, so noone with five doses could possibly have gotten very sick and said anything at all. He's just making five doses sound ridiculous. He has no rational argument.
He could have a rational opinion — a vaccine against an older disease is often given in five doses or even more, and he could have a general, well-reasoned opinion about vaccine doses. (Google for "during childhood, five doses are recommended, with a sixth given during adolescence" if you want to read about that.)
AFAICT peekaboo hasn't ever suggested that the vaccine for that disease is idiotic, and he also hasn't suggested reasons why why covid should require fewer doses than that disease. He just makes stuff up, and that's a fine example of what I meant by "covidiot". (peekaboo: If you have posted any of that, perhaps elsewhere on the web, please do post links and I'll apologise.)