Could not disagree more. If anything 2023 has convinced me that Ross is a good manager, and while I don't watch every team regularly to get a good sense of other managers, I'd be shocked if there were 10 better than him. I'll grant that you need to have a reliever warming in the 9th, though the 3 hits taking all of 6 pitches is a bit aberrant. Heading into that inning Assad had given up one hit in those 5 innings, has been starting so he wasn't pushing his luck endurance wise, and most importantly was eating valuable innings from a pen that was gassed. Fulmer and Boxberger were almost certainly down, and Alzolay probably should be given his newness to relief and injury history. For a game that very easily could have gone to extra innings, trying for one more from cruising Assad against 7-8-9 is extremely logical.
More generally, Ross does a very good job of balancing SP workload, the game remained close partially because he took the uncommon step of yanking Taillon before the end of the 3rd, and he'll also ride strong starters(especially Stroman) to ensure he doesn't lean too hard on the pen. He's fine moving relievers in and out of leverage situations as their form waxes and wanes. He's aggressive in pinch hitting even before the late innings when the moment presents itself(this also makes a chunk of the batting order complaints unfounded), and most of the gripes about position player selection round to 'there aren't any good LHH platoon/bench options and our RHH platoon/bench options have exploitable flaws'. Ross is fine, better than fine I would wager.