Try to drive with one hand for example. In a real car I think I almost never use two hands, even with sharp turns.
This is very significant fact which explains why everything in GT7 and simracing comes so diffiult for you. You are very often misteking things looking at them from wrong perspective leading to your wrong perception that something is good or bad.
Driving one hand IRL i basicly primal sin of driving (speaking of person with both hands) and most likely driving faster then 40kmh. For any driving you should keep both hands on the wheel. Driving one hand makes ppl like you think your drive like a boss. But in case on the road happend anything similar to what you are forcing on the race track (like in GT7) all the time would make you end up in the tree complaining there is something wrong with the phisics and programing in this Real Liefe or car.
I tried monza and the first right-left corner I simply can not take ...
This again proves you have no technic of using/roatating the Wheel both IRL and in game. It needs a practice to make a quick 60-90 deg turns - and yes - in some cars and many turns on different tracks you need to roll the wheel beyod reach of single grip - you need to shuffle the hands properly (even if monza shicane is not ideal example of that).
Look around internet about racing driving hands technic - trust me - in Dirt or any WRC game this will be even more significant (as you need to do it quick as hell.
Ok, in WRC games usually the FFB is being felt diferently as gravel is very smoothly (edt. gently) forcing wheel out of your hands, but basically if you drive an asphalt stage you would have the same immersion (edt. ripping wheel from your hands).
You can feel much more with a wheel so driving should be easier cause normally you feel much better what a car does
It would be lie saying that driving very fast and without faults (spinning around) with the wheel both IRL or GT7 is easy. It needs being trained and mastered- like anything which looks super easy when watching pros doing it.
It can be that the FFB setting of your wheel and GTS FFB settings are not perfecly matching your taste - so look around the forum how to play with them looking for your preference. I played quicly T300 at my friends and being used to G29 and Fanatec DD I had no issue with having a nice feel for weight transfer and oversteer of the car.
Yesterday I phoned an old friend and he says he always drives in GTA races
GTA has a nice and very easy arcade style of driving, but has very little to do with IRL or simdriving. So this is very wrong reference.
Clearly your challange is that wheel needs more rotation then 180deg each direction to make a full lock.
In some wheels you can change a full lock - meaning instead od 1080 or 900 deg you can lower it downto 600 or 450 (like in F1 car). BUt lowering it down you reduce a resolution of your movements meaning it can be difficult to choose the right wheel reaction not to overshoot the countersteer or similar - again ending you in the wall.
All in all Sorry Joey, but this is really hard to be supportive and not frustrated in longer range with someone who has a wrong approach and blames everything but his lack of understanding or skills.