The secret to fixing things is to unify the ruleset of both EDH and 1v1. 60 card highlander with a commander. 25 life total. Modern onward cardpool. No rotation. Applied to both formats.

Now EDH players can use their commander decks for regular 1v1 play and vice versa. Commander's in 1v1 will keep decks from becoming monotonous outside of top competative. The ability to drift back and forth between the formats effortlessly will bring the gentleman's agreement to not be a sweaty tryhard faggots into 1v1.

You won't even notice the missing 39 cards in commander since half of your stack is just identical or near identical copies of other cards in your deck. This'll let you even further personlize or theme decks since which individual cards you pick will matter more. They'll fit in normal sized deckboxes and shuffling won't be a nightmare. The lower life total means games won't take a fucking hour and playgroups could always bump it up if they want it to last longer.