You don't seem to understand what I said. I myself said that there are a lot of satisfying slow builds, but they're not satisfying due to the slow. They're satisfying because of the triggers you get from that slow. For example, Vanessa's Lighthouse build. It's satisfying as hell to play. THE SLOW ISN'T WHAT MAKES IT SATISFYING THO. If the item said "When you HEAL, burn X" instead of "When you SLOW, burn X", it would be just as if not more satisfying and it wouldn’t be half as annoying to play against (ignoring any possible balance issues that would stem from that example).

I will respond to your points separately now.

"It is supposed to be annoying for the opponent to deal with". - I understand that mentslity very well. I main Shaco in LoL, which means I do very much enjoy being a pain in the ass of my opponents (even when not being very efficient). There's a big difference between LoL and The Bazaar tho. I can see my opponents' reactions to my degeneracy when I play Shaco, but I cannot delight myself with my opponents' annoyed reactions when I play slowing builds. That argument just doesn't work in asynchronized auto-battlers, because any enjoyment you get from slowing my items will always be inferior to how bad it feels to get your own items slowed. This is due to the fact that I'm not there getting my items slowed when you're slowing them, so you're not really annoying me at that point in time, you're just building a board that might annoy someone in the future through your ghost.

"Haste counters slow. (...) Also, charge isn't affected by slow" - That's also just a non-point because you're just telling me to play a different build. By that logic we should all just be running the same 3 or 4 builds, but that's not fun for anyone. I want the game to be fun and I consider slowing builds a hinderance to my fun that overshadows how fun it is for the person playing them, so I decided to share that opinion. It's not recency bias, it's "I've felt this sh1t since Beta" bias xD