Wow! I forgot about the head gasket?
I know what I would do. I would pull out the engine and disassemble the bottom end for inspection.
Even so if that is over your head, you may not need anything new but gaskets. Last time I was involved in something like this, the engine shop wanted 1500 to go through it for labor.
I agree with Sharky. It won't correct itself. The lifters should look new and they are showing signs of galling.
I think that the only solution is obvious but it's your call.
Many of us here understand disappointment and frustration. We are not trying to spend your money for you.
I would want to see what the main and rod journals and bearings look like with any kind of an oiling issue.
This could be a very small fix but it's best to pull the engine and put it up on a stand and do a thourough exam. Otherwise you will always be waiting for a major failure whenever you drive it.
These engines are not fragile primadonnas. They just need to be assembled right with the correct parts.
Before you decide, call Compcams. Explain what you think is an issue and send them the pictures and videos.
Ask THEM if they recommend oil restrictors with that set up.