The problem is that you chalk these reviews as being irritating when every single negative review should actually be taken seriously, and actions taken if appropriate.
The mindset is very different when you operate long term vs short term like Airbnb. A higher level of service is expected if you're running Airbnb, and 4.5/5.0 is basically bottom 10 percentile for Airbnb listings.
It may actually be a good idea to convert this listing into long term like Pete28 did if you don't want to take the time to address the issues raised by guests or if it's not conceivable (for various reasons). Long term guests are more tolerant and not fussy about the small things, since they're saving on rent compared to short term rental (and also don't have a platform to complain on).
Take 'Slow Filling Toilet' for one, I got this complaint recently, and took it very seriously. Spent time on the same day (of receiving the message) to work on it, and then kept following up with the guest (to check satisfaction), followed by a partial refund (in this case, we timed it to after checkout).