I'm just a random guy saying, don't give up, if I can do it, certainly you can as well, just keep practicing, look back and see what you can do to improve your strategy, maybe you need to work on your Web enumeration ? Active Directory? Local privesc ? Or was it time constraint ?

Try doing active HTB machines, these machines really helped me with my exam plus with my pentests, I don't really consider TJ Null's list to be relevant now as most of those machines are quite old for the exam, tbh HTB active machines are harder than the exam but they kinda prepare you for the exam.

You are skilled enough to go beyond OSCP as you mentioned you made your own vulnerable network which kinda shows that you know your stuff, take your time coming back to OSCP and building up your methodology for tackling box, I believe you can pass your exam, the next post I wanna see from you is that you cleared your exam 🙏🏻