How do I respond/defend against this?

So I was playing support in normals, "for the S to get hextech chests" , our jg disconnected from the start and continually disconnected throughout the game and could not do anything, I never said anything negative about him, "unless calling the game a 4v5 is...still wasnt saying anything was his fault or he was bad"

But here is where the problem begins.... the enemy jg started directly abusing the disconnects and invaded, i often roamed to jungle to try to stop her but i`m not and cant force yi to run so he died multiple times for free..

Then came the group fights...oh boy...whenever anything went in the enemy teams favor...if even slightly like a 3 for 2 trade, the enemy would say our team was rekt.... and i ended up spending a good 20 minutes trying to defend our team, saying that we will were winning many group fights and even aced them despite the 4v5...and ofc says i`m just making "excuses" (for how good we are doing despite our situation i guess?)

Well the enemy team ends up losing a fight that and missed out on and so compares that to my 4v5 arguement.... which i dont really understand because they were still farming/splitpushing.. its not like they were dcd, if anything its their fault for not grouping since their team has the "capacity" of 5 players....

So we end up losing this game... didnt even have his 3 items finished before the last fight which was pretty late in the game... continues to say our team was completly rekt and that I am trash and says thanks for the ez win...

It must be written somewhere that the team that wins is inherently better in every way no matter what? ? I just don`t know where people get these ideas from... I understand its normals but players like this make the game feel like its not even worth starting up ... lol

(sorry for wall of text...some people likes stories tho right?)