Recently I attended an all-levels workshop with an instructor who was new to me, and one of the first things she said was (paraphrasing slightly): "there's nothing wrong with attending a beginner level workshop, because you can always work on your fundamentals - they are the roots, they are necessary in order to really be able to dance the dance, to feel the dance and not just dance the moves".
However, reading between the lines of what you're saying from below:
EXACTLY, THANK YOU. The moment that the beginner follow dances with some guy who obviously knows his thing, it is like they can care less about you or worse start lecturing you about things that even they don't know. A dance with them is just something to pass the time and go around the rueda to your favourite salsero. This is why I always prefer to dance with advanced followers at socials, they're always much kinder and willing to actually give the newbie a chance, and seem really happy to dance with anyone who has no bad intention. Yesterday I went to a socials where at one point I tried to dance bachata first with some girl who I don't know & afterwards also with some girl from the classes. Both of them did not know how to dance. The first one danced with me anyway and loved it, gave me a highfive at the end of the night; the one I knew who was a beginner dipped in the middle of the song & was horribly rude about it.
I'm attending a second class where some girl at one point just said something really rude (complaining about how beginner guys have no clue how to lead, imagine that) & the instructor explained it all how we're new, how its only n-th class & how it is normal and thanked her for asking the question but adding that "after that not many people will wanna dance with you".
I get it: are you saying that the more experienced lead is disrupting the expectations and focus of the followers, the lead is unbalancing the learning opportunity for the rest of the leads in the class - am I correct in my understanding?
Sorry to say, but that can and does happen, but moreover it has not so much to do with the lead, but rather having followers with poor attitudes in your class. Even when you yourself are more experienced, these same followers will probably retain this poor attitude (unless they wise up and change their perspectives) - so beware!
I would applaud your instructor from the second class for calling out that complaining follower - avoid dancing with them at all costs!
As a beginner, you just need to focus on your own learning opportunity and not be overly dependent on others' perceptions and attitudes, including their enjoyment of a dance with you... as selfish as that may sound. If it's in a class, then the only person you can rely on is the instructor to keep all their students' attitudes in check. If they do not, then you'd be best off finding a different instructor with better class management.