Stucked in OCLP? This is how to get rid of it

I will leave this here for anyone who potentially run into same issue as me..

I had old Macbook Pro 13" 2015 where I installed open core legacy and unsupported macOS. Installed Sonoma, and after while also Sequoia. With Sequoia system was already really slow and in combination with several other bugs I decided to get rid of OCLP and perform factory reset.

Problem was I couldn't.

Macbook didn't let me go to macOS recovery - CMD+R always ended with infinite (but completed) loading bar screen with Apple logo.

Same situation happend with internet recovery. Again only loading bar with Apple logo showed up but never load no matter how long I waited. And same happened with bootable USB.

SO HOW TO GET RID OF IT? (backup important data before)

1) run OCLP and press "create macOS installer. Select the oldest possible system to install (in my case it was Big Sur) and install the system.

2) When installation is complete you should be able to access recovery mode by now when pressing CMD+R during restart.

Problem was OCLP was still there even after factory reset - and boot from USB still wasn't possible.

3) Go to recovery mode again CREATE A NEW DISK PARTITION in disk utility. By now it should already offer Monterey which was the last supported macOS - Install it to the NEWLY CREATED PARTITION.

When Monterey is installed, OCLP app should be gone and any OCLP folders as well.

4) Go to recovery mode again and in disk utility locate the old disk partition and remove it.

By now OCLP crap should be gone. You can verify it in the terminal via "diskutil list" command. Also it is possible to do during startup while you hold option key (no EFI disk should be there). Same in System preferences - startup disk (no other disk than a startup disk).

This is how I was able to bypass being stucked in OCLP. Hope it helps.