I need to ask if you have ever played a Octavia or Green Ringer type of circuit before?
The reason is that it is not a pretty sound (straight up) to many guitarists. It is meant for single note soloing type stuff with FUZZ.
I ask because “sounding like crap” is extremely subjective. For example if I played some Doom riffs in Drop A for some folks on here (Wilkie1) would likely say that sounds like crap while others may send me gifts and rewards.
If you have used a similar circuit before knowing what to expect and it does not sound like that then we should examine if there is an issue. Namely matching the capacitors is recommended. You should use the suggested transistor as well.
Here is a video of BYOCs version: