With an hour gone in the subsequent leg, the guests were in finished control because of Kylian Mbappe's second objective of the tie.
In any case, they were left staggered by Karim Benzema's 17-minute full go-around and experienced another difficult leave the opposition they pine for more than some other.
"The primary [Benzema] objective totally changed the game," said Pochettino.
"For 60 minutes, we were superior to Real Madrid. The air changed in the arena. We committed a few errors from that point onward, we can't say we didn't. The most exceedingly terrible inclination is that we were the better side, however we lost the tie in a short time.
"Paris St-Germain have been pursuing the Champions League for various years at this point.
"I'm truly disheartened, upset - yet these things can occur. The following not many weeks won't be simple."
Since moving under Qatari proprietorship in 2011, PSG have collected a progression of ritzy crews.
Be that as it may, their fantasies about winning European club football's first class rivalry have been over and over sabotaged by a few falls from winning positions, remembering the 6-1 whipping by Barcelona for 2017 and the last-16 loss by Manchester United in 2019.
"We have been here before with PSG. Too often, this is an enormous disappointment. A ton is down to the players on the pitch since you can't commit these errors," French football columnist Julien Laurens told BBC Radio 5 Live.
"Pochettino won't be there next season, I can let you know that - except if they can't get [Zinedine] Zidane in. I don't think he needs to be there; he needs to be in England.
"His family is as yet in London and he has been in a lodging in Paris for a year and perhaps that is a contributor to the issue. You can't allow your group to sink as they did this evening without answering. He has been excessively receptive."
Laurens additionally censured Pochettino's standard pivoting of his two goalkeepers, Gianluigi Donnarumma and Keylor Navas, and addressed whether the players had the right concentration to work on their away structure - they have won only one of four Ligue 1 matches on their movements since the turn of the year.
"The goalkeeping circumstance is insane," Laurens said. "He doesn't place them in the right climate to be great. No one can tell who will play straightaway.
"The away structure isn't sufficient - not simply in the Champions League. They have an enormous issue mentally away from home since they don't invest the energy in. They can't crush out an outcome when under tension.
"The smugness gets me - when you have discarded leads like this but you are as yet careless like they were this evening. This is the Champions League and it returned to cause major problems for them."
'It is important for PSG's instilled culture'
Previous England midfielder Steve McManaman, who won the Champions League two times during his time at Real Madrid, gave a cursing evaluation of one more PSG disappointment in the opposition.
The Ligue 1 pioneers arrived at the last and semi-finals in successive seasons however have likewise been taken out at the last-16 phase in four of their beyond six Champions League crusades.
"We anticipated that PSG should disentangle. They did what they generally do, when they go under pressure, they liquefy away," said McManaman on BT Sport.
"There was no association and no administration. The players are excessively strong. Whenever hard times arise, they couldn't care less. They simply play anything they desire to play.
"You can't have four or five [players] not extravagant it whenever hardship rears its ugly head.
"PSG committed errors continually in the final part. You need to give Real credit on the grounds that in any event, when they are down, they stay in the game.
"We have seen administrators come and go and they can't figure it out. They come, they get taken out of the Champions League and get sacked and afterward continue on."
Previous Manchester United protector Rio Ferdinand repeated those feelings, adding: "It is the attitude and perhaps the way of life of the club.
"This isn't something new at the club. They have phenomenal ability in the crew yet when the mindset isn't right on the day, you need to remain in the game. They didn't do that. It is essential for the imbued culture at PSG."
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