Yet your own post shows that of 4 impeachment’s in the history of the USA, she has initiated half of them.....
I think that is more indicative of the person currently occupying the office of the POTUS than Nancy Pelosi.
How's about 'Nancy Pelosi is the Speaker of the House and she is not afraid of doing her job'?
And as for your assertion that she is acting like she is the President, well, she is certainly acting far more Presidential than Trump ever has, but she has responsibilities to the constitution that she was elected to uphold. Despite Trump taking an oath to uphold the constitution, he has attempted to destroy it at pretty much every opportunity.
Also, you do realize, that as speaker of the house, she is next in line to be President after the Vice-President.