Actually the "Let's Go Brandon" phrase has an interesting origin of a reporter trying to say the crowd was cheering for a Nascar driver named Brandon while they were clearly chanting "Fuck Joe Biden". So it became a euphemism for the actual phrase they were cheering and a callback towards that event that shows the media's biased coverage.

So yes, I think that phrase is a bit deeper than saying someone has tiny hands? over and over for a decade.

Seeing the origin stories in this thread I'd actually argue that "let's go Brandon" is not really a cheap joke. (I guess, really, that it's at least not as cheap as "tiny hands".) The "tiny hands" joke exists for the sole purpose of making fun of a particular politician and the "let's go Brandon" joke at least speaks to a certain bias in presenting information. It seems a lot like a reporter "misheard" "Fuck Joe Biden" as "let's go Brandon" because the reporter didn't want to report that people were chanting "Fuck Joe Biden".

At a time when "rightists" commonly complain about media bias, this exact sort of bias happens. Then people use it as a dog-whistle for calling out media bias; it's not surprising. As with all polarizing issues, it's best for every individual to consider their own bias. I have found that I frequently don't give a person's opinion a fair shake because I've already concluded that I disagree. Generally, I only do that when I'm not interested in learning.

Anyway, they may both be cheap jokes but this seems a bit like a false equivalence or otherwise misunderstands the argument being made.