Why is OBS so unreliable?

Whenever I try to record with OBS, I always have to make a 30 second recording beforehand to see if it's lagging or not. And whenever I record, there's a 50/50 chance that all the footage is 1fps BS even though my game runs fine while recording. I don't get why this is happening and I've tried multiple fixes but none of them work. Anyone here know any good recording software recommendations or how to permanently fix my lag (which I doubt is possible).
 
WBE is being so polite

As stated above, start by RTFM, in this case at a bare minimum the pinned post in this forum

The fact that your games runs fine is irrelevant. Any recording software will have to, on top of everything else your PC is doing, perform real-time video encoding which is VERY computationally demanding. So, do you have a PC up to the task of both your game AND real-time encoding?.. in your case, with your OS and OBS settings and whatever else you are running on your computer .. the answer appears to be a 'No, not reliably'. That doesn't mean its OBS' fault, or any equivalent software could do any different.
One alternative might be to use a very limited capability software optimized for encoding offload to a GPU with a dedicated encoding chip. Yes, OBS can do the GPU encode offload as well, but also has lots of other, CPU demanding, options, so the onus in on you, if you have an under-powered system, is to learn the options and implications of those options and adjust accordingly. There are many discussions in this forum on just this.

I recommend monitoring hardware resource (CPU, GPU, RAM, Disk I/O, etc) utilization [for ex. using Task manager’s Performance tab and/or Resource Monitor] to see if your system is being maxed out with your settings https://obsproject.com/wiki/General-Performance-and-Encoding-Issues and https://obsproject.com/wiki/GPU-overload-issues

And for a quick automated review of your OBS log [not your PC as a whole, which could just as easily be the problem], try See what the Log-Analyzer says to your log file:
 
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