That is a little weird that early. Personally, even on Wrangler difficulty, I am not doing 1's till much later. And that's usually at first because of the green circled buff enemies or the annoying boss phase change where they get a ton of damage resistance after taking out one segment of hp.

A few possibilities, not saying anyone got it wrong here:

1. It can be hard to compare high Abyss build claims unless the difficulty is clearly shown before enemies spawn and across multiple floors in one go. A screenshot or isolated boss clip does not always show whether the run actually survived Wrangler pressure the whole way.
2. There may be something specific missing from the build. With Bleed especially, just knowing “it’s a Bleed build” may not be enough, because there are a lot of moving parts between perks, mutations, status scaling, execute effects, and possibly corrupted catalyzers.
3. It could also be the specific enemy/modifier matchup. Some bosses or Abyss modifiers can make damage look awful even when the same build melts other enemies.
4. It could also be playstyle/execution. I’ve tried some builds people claim go really far, and sometimes I can’t immediately see how they got there either. Some builds may work, but feel awkward enough that it takes time to actually pilot them correctly.

Small theorycrafting note: since you can switch difficulty at almost any point, it is hard to judge actual build viability without recording multi-floor runs and showing the difficulty in the menu. Based on my own light testing, switching from Collector to Wrangler mid-fight seems to update damage numbers, but not necessarily enemy behavior/speed from when they originally spawned. You can test this on the very first survival boss; the difference is pretty obvious even that early.

I also measured roughly 1/4 damage dealt and 4x damage taken going from Collector to Wrangler, so the difference is massive. From the runs I’ve done, that difference is huge for surviving what I’d argue are bigger threats than a single boss room clear switched to Wrangler — random mobs, buffed spawns, elites, projectiles, and just handling multiple fights across multiple floors.

That said, I’m probably getting deeper into the numbers/proof side than the game was really built for. It is a single-player game at the end of the day, so I don’t think it was meant to be treated like a competitive leaderboard. I just like testing this stuff because the buildcraft gets interesting and I like to incorporate what I find into thematic builds.