I forgot to add to the discussion that after pondering the measurement problem for some time, I think I have actually discovered yet another layer of mistery within it. What if you have a QM observer inside another QM observer, so there is a hierarchy of infinites? This can happen arbitrarily many times. I haven't really seen this discussed in physics yet.
If I understand correctly then some versions of the MWI can handle this too. The other interpretations not so much. This is another reason why I suspect that this is the best picture of QM we have so far. Maybe nested QM observers will even be testable one day. I may be wrong of course it's just my interpretation.