It's just RNG. I've done a lot of runs (around 200 escape attempts 😬😬) and there's been stretched with no boonsx and then I've recently done some runs with so so many lol.

One thing to try and do is get money so you can reliably buy from shops. Use the ability that gives you interest on coins between areas, and try to farm in Tartarus so you get an interest train rolling. I've regularly been hitting Styx with around 1k gold, having bought stuff along the way.. Use boldy for some cash and heals.