Dont worry the guy you played with is a "smurf" a smurf is someone who is too insecure/scared to play on his main account.
His playstyle and game knowledge is to good for someone with only 7 games played.
Your game:
Why dont you start with building a MG42?
Try to use greencover more, you are engaging penals in the house in yellow/no cover and it takes you mutiple grensquads with mutiple retreats to dislodge that penal in the house, you should defend that house from the start.
*note the redline at the victory point that is a perfect place to build a sandbag with your pioneer since the green cover will only face the enemy.
Try to avoid your squads standing on redcover, now your gren could lose to a engineer wich it otherwise would have won.
Please keep in mind that flames do
additional damage units in greencover/garisons so always resposistion your units out of greencover if you encounter flames
At 7minute mark you lost 2 grensquads in 30 seconds wich could have been easily avoided.
At 7minute you can see the "Armor piercing round" icon being active on the DHSK in the church so you should have kept your 222 away and almost instantly lost it.
At 9 min mark you lost basiclly all your army and called in a Mortar HT, you could have predicted there would be a T70 soon since you heard the planes dropping fuel for your opponent so a Puma would have been a better option but with these many casulties I doubt it would have helped.
Basically you got some slobby losses and couldnt recover for that point on but everyone had those when he just started playing the game, just keep playing and eventually you will improve.
Goodluck!