Posting jokes and memes also is effective to get an upvote for your post but sometimes if it isn't really funny at all, you can get downvoted for that.
The posting on relevant posts is a must and you must know where the right sub reddit you should be with your interest.
Yea definitely there will be people who don't find certain post funny but there will also be people who find it funny :3.
To be fair, every post is like that, no matter how well written your article is or how relevant you cross-post to, there will be jokers who downvote it.
But I understand where you're coming from.
Cheers, bud.
I don't really join conversations on the subreddits that I follow but I'm seeing that if a post isn't really funny and the meme too, it will get downvoted especially if it is off-topic or something that flames others user.
Cheers.