I'm American. I've never cared about the State of the Union address. It's not unlikely speeches given by British politicians taking credit often for things that have little to do what they did or the tearing apart parties do of each other not surprising in the response. SO yeah, YABU to be so amused that people don't care about it.
You're also unreasonable for not seeing that at this point in the US election cycle, we shouldn't be comparing him Biden to the Republicans or any other US political party or any 'influencers', we're meant to be comparing him to other Democrat options. We're meant to be asking 'Is this the best person for the Democrats to put forward?'.
I wouldn't say I'm anti-Biden, but I was very disappointed in the Democrat Party push for him in 2020 well before the primaries. He was the the safe for center-right option with very deep pockets - that's why all of our options are over retirement age, they've had the time get the wealth needed to be supported to run. People want to use 'oh they've had a long career' - but has that career been any good? Do we want the same politicians who have been getting us into the same mess for decades?
I don't think Biden comes across as sharp, I think he comes across - and has throughout much of his long career - like a weathervane, happy to blow in whatever direction the mood is going in. He has been part of many awful political choices over the decades. While much of the issues of the US in the last four years haven't been his fault, he continues to be lead around by his party rather than being a leader. Of course he's better than pundits, that doesn't mean Biden's the best the Democrats to lead.
The Democrats have far better potential options, not that they'd be allowed to run or could afford to do so. The Republicans also have a range of options, but who is allowed to run has nothing to do with skill or the quality of their careers, and everything to do with who can get the financing together far before getting the party to recognise them. We have bigger problems that people ignoring the SOTU that few outside of politics care about.