Your compressed Overton window isn't doing you any favors. If all you see is "left" on bluesky, then you're operating on the terms that liberals and conservatives use, usually unconsciously, to further the interests of capital at their own expense.
If you look closer, you'll see that liberal != leftist, and both exist on BS, and not exclusively in echo chambers.
There's currently a shift or awakening happening where some liberals are actually self reflecting for a change, because they realize they're standing on false ground.
Also, you can see on the bluesky subreddit that many users are aware that they shouldn't be blindly trusting the curated user blocklists, if for no other reason that they're being curated dishonestly (surprise, surprise).
Old Twitter was always a steaming pile, and Musk didn't change that with X. Bluesky is actually innovative and refreshing. Time will tell how that holds up.