Oh pleeease, do a search next time.
This has been said 913824719 times already and you even said you know "it's just alpha". Why did you open this thread then? *sighs*
Just FYI, the AI is still on S1 levels and doesn't know tyre heat/wear/dirtyness, fuel consumption, suspension damage and maybe even downforce and the banking of track parts. Yes it is pretty stupid. Yes it doesn't drive very clean. Yes, even the learning routine doesn't work too well for S2 anymore, as Scawen stated himself. And yes, they are NO competition, even for a semi good driver.
Now you know it all, and again, please do a search next time.