yeh me and my friend drank 9 bottles. some bottles have foamy some not so much. but all of them have average hissing when opening.
Btw i guess alcohol is not enough.i had to drink 4 bottles to get drunk. however i ended up feeling sick and now i hate any beers, even smells of them makes me puke
Considering your OG and 9L added water and the 1.05 target, you beer should be about 5% alcohol.
This means you are an alcoholic
Since all of them had decent carbonation, they probably had too much yeast per bottle rather than being infected. Look into cold crashing and gelatin fining to learn how to make crystal clear beer.
When you are drinking them, pour them to a glass by slanting the bottle and make sure you leave the yeast at the bottom, which should be settled for the most part at this point. They will taste way better without the yeast, just saying this in case you were drinking from the bottle.
You also fermented it way too hot. Your room was around 25C, the fermentation probably happened to be near 30C. This produces a bunch of nasty stuff. Majority of the fermentation(for ales) should happen around 15-20C. On top of this, it's heavily oxidized from all the times you opened the fermenter and poured it in for bottling.
I am guessing it leaves a bitter taste after you swallow a pint. Being an alcoholic, I am also guessing you are going to return to homebrewing soon

Might I suggest a BIAB lager? Your balcony is cold enough and you won't produce any off flavors at these temperatures. You just need a bag, some grains, and a yeast.