@Kaveramma0
The average star of 4 is really a big issue to overcome.
Turn on Airbnb New Host Discount
Turn on Instabook both things will move you up in Airbnb Search to combat the 4.
Spell Coffee correctly.
Build up your Host Profile Display the hospitality brand family attitude you promote.
Change cover photo to something more family intimate not a big building in grass
Change your description
Do not mention prices
Do tell me what I am renting all I can kind of guess is 2 beds for 5 people.
Your negative review talked about shared areas make it clear an I sharing the kitchen.
Power Outages are not your fault but from the other side not the guests fault either. The Guest wasn't complaining you caused the problem. The Guests complaint was more you weren't assisting when an issue.
The Guest was probably not from a country where there are blackouts regularly. In some countries it does happen regularly.
You need to develop your process of what will be done and when. Put it in the top part of your ad maybe bullet points the routine. Mistakes happen to every business you don't want the mistake remembered you want your amazing business solution.