Y'shtola Rhul: I think my first deck from scratch is a dud. Abandon or retune?

Deck: https://archidekt.com/decks/22823158/yshtola_rhul_help

I'm fairly new to Magic and started with the Limit Break precon a few months ago and slowly upgraded it using other peoples' upgrades and input from friends. I'm super happy with that deck and love playing with it but I play in a couple of pods where it just isn't strong enough.

I pulled the monoblue [[Y'shtola Rhul]] card and my friend who has been playing for years said it would make a cool and unique commander so it's ended up being what I decided to build around.

Where it is at now is after a few rounds of tweaks where it felt like I didn't have enough creatures. I removed some of the big monoblue game changers such as [[Expropriate]] and [[Cyclonic Rift]] because I don't find them fun to play against and there have been a couple of groans when I'd previously managed to get them off.

This deck can be very strong; with ETB doublers and triggered ability doublers out, I can get some insane value out of cards like [[Aether Channeler]], [[Agent of Treachery]], [[Astral Dragon]] and [[Urza, Lord High Artificer]].

The big problem I'm having is consistency. So far it feels like I have 33% of games being strong, with the other times being pretty tepid. This deck suffers when I miss land drops and mana rocks. Additionally, now that some of my powerful combos have happened, the deck has become the villain in my pods so my mana rocks get removed and people know I generally won't block because I need things to survive so I can get value out of Y'shtola. I wouldn't mind being the hard target for being locked down as long as the deck was more consistent! Any kind of disruption to my early game and I'm basically shut down for the rest of the game - it just completely falls flat. There also doesn't appear to be many win cons and I'm struggling to find ones that would slot in to this deck.

I'd appreciate any feedback really - I feel like I'm at the end of my ability to make tweaks because there's only so much keyword searching on Scryfall I can do. Ultimately, it feelsl like I need expansive knowledge of cards to exploit the interactions going on here.

Trying to decide if this deck is even worth trying to improve or if I should move on.