He held that much power as Speaker of the House ?
So Pelosi has holy crap power too ?
Hard to believe but possible. (Not to mention don’t want to believe.)
Speaker has MASSIVE power, they are 3rd in line in succession of the US Presidency.
They literally decide what can and cannot be voted on in the House.
Bills have to pass both House and Senate to become Law.
They have to sign off on all subpoenas issued by the House, any charges of perjury / lying in testimony / contempt.
Ryan promised to fund Trumps Wall publicly dozens of times, but would not let the funding vote come to the floor ever.
SoH is the only person with power to issue subpoenas
Jordan, Gaetz and Nunes repeatedly tried to issue subpoenas for information on the Comey shenanigans, Hillary shenanigans, Clapper shenanigans, Mueller shenanigans, Andrew Weissman shenanigans, Eric Ciaramella shenanigans, Ryan blocked them all, Trey Gowdy also was in cahoots with Ryan for all that.
House republicans wanted to impeach Rod Rosenstein, Ryan blocked that too.
SoH also can stack the deck the way they like, not only by giving committee assignments but literally control what members are allowed to speak on the floor during debates.
They literally set and control the entire agenda for the house (and by extension the senate) during their term. Arguably they are much more powerful than the POTUS whos main powers are VETO, foreign affairs and the Bully Pulpit.
Edit - Also Capitol Police are outside the scope of the rest of the Fed and answer only to a committee headed by SoH.
Ryan could have made it his agenda to clean house of bad actors, he decided to let it all burn because he hated Trump.
Ryan was Romneys running mate and Mitt hates Trump too.