Frustrated with BR 8.0 ground AB

Hi guys. I’m a rookie player grinding my first ever ground tree which is Germany. I just recently unlocked my Leopard I tank , going from BR 7.3 to BR 8.0
I’m not a bad player in my opinion. i usually had no problem getting 3-5 kills in each match in my previous BR (7.3) but after upgrading to 8.0 everything has changed since i basically entered modern era.
unlike before , i can barely and rarely get a kill. leopard I has minor armor and APDS rounds for start which makes up for a very hard and frustrating time for me. one-shoting targets with APDS isn’t possible unless you hit the ammunition. most of the time even when i finally manage to hit my target it can easily turn back and shoot me because my round didn’t damage anything critical. or even when i do manage to critically damage them , my teammates come and steal my kill. sometimes i can hit a target several times without it being destroyed which is extremely annoying for me who is used to APHE shells. with APHE , one shot in the turret and your target is usually gone. however most modern tanks keep no ammunition in the turret so you can hit the turret with APDS as much as you want without them being destroyed. which is extremely annoying especially when only their turret is in sight.
long story short I’m extremely frustrated. sometimes to the point of rage-quit.
do you guys have any suggestions or advice?

I’m on the premium 8.0 loadout with France, Italy, and Sweden and can tell you about it.

Facing 8.7 and 9.0s constantly is unavoidable, because this blackhole BR. There’s no shortage of MBT-70 series users too, which is lower .3 compared to RB.

Ditch the light MBTs like Leopard, they are awful. They’re only useful as backup tanks.

Your best bet is the M48 series, because they are just armored enough to resist poorly armed APHEs and SPAAs.

Then try to get the light tanks like DF105.

The PZH and M109 are also good, they can destroy everything, even T-55AM1.

If you’re willing to go higher, the Gepard is also great fun, it can destroy light tanks like TAM easily and given prolonged time, even T-72 by shooting into the ground to bounce to the hull armor with APHE. I have the Type 87 and M246 which have similar playstyle and role. Moreover they are stabilized, allowing for machine gunning on the move and killing airplanes.

uhh play realistic?

Flank and go for vital components first like the Gunner and commander or breech.

Also how come you havent complained about the 35mm SPAA’s or XM800T?