We finished 17th last season. We lost the most games in Premier League history of any team that wasn't relegated. We conceded the 5th most goals in the league last season. Romero and VDV have struggled to even get on a pitch for us regularly over the last few seasons let alone be the best up and coming centre half in Europe and saving us in countless games as you say. Look, i hope you're right about how great our squad is and I am wrong about how bang average it is. I really do.
but to take the performance in the league and attribute it to the defensive frailties of players you suggest are not up to scratch is just manipulating the information to suit your agenda. We had a massive, unprecedented injury crisis which prevented most of the back line from being available, including the goalkeeper. There was then a strategic decision taken to not play some of the key players you so denigrate in league games as the final stages of the Europa League came up.
Literally you are criticising players for performances they were not involved in.