I haven't seen any of it so can't comment on whether it is good or bad (one of my hates is people being opinionated about stuff they haven't read, listened to or watched). However on the character of Bona Fett, as I understand it the story is that after escaping from the Sarlac he spent a long time with the Tusken Raiders. There's a lot of potential there for character development and to explore how the experience of the Sarlac followed by living with the Tusken Raiders changed him. So in itself going from ultimate bad ass to social justice warrior is not necessarily incoherent or silly if well written. Not saying that's how I would want him developed but it's a valid line of development others might like. No idea how they are developing it in the show as I haven't watched.
I think the real problem is the franchise concept which sees production companies repackaging the same stories, reinventing wheels, inserting their own vision of established characters and structures into established stories etc over and over, generally doing a bit more damage to the original with each iteration.
If I look at the sequel trilogy, the first one just repackaged episode 4, the second one took a wrecking ball to the characters from the original trilogy and the third one was a vain attempt to try and make something of the first two. There was clearly no real vision for the story, it was all very derivative and clichéd and ultimately felt like lazy and inept story telling carried along by great special effects and residual affection for the originals. I did watch the Mandalorian and I will say it was orders of magnitude better than the sequel trilogy, but at the same time if it hadn't been riding on the back of the Star Wars brand my rating of it would probably be average - nothing special. The original trilogy had a beginning, a middle and an end, I can't help feeling it might have been better to leave it at that. However, I love the Thrawn stories, in a completely different league to the junk of the movie sequels