No, P-38s were superior to LW twin engine types in A2A combat,
109s & 190s, not so much..
As a 109 and 190 pilot in the game, I have to say you're an absolute moron to assert as much. The 190 had problems maneuvering at altitude, and both were slower untill the high altitude As verisons came out, and the 190D was introduced.
The P-38 can hold its own against the 109K at high altitude as well, and is superior to all other 109's.
At mid altitude, it is my opinion that the P-38J/L are the equal or better of all but the 109K. At medium altitude, the P-38 is obviously the equal or better of any 190, save the Ta-152, and possibly the 190D.
At low altitude, the P-38 J/L is inferior to the K4, equal to the G-14, and slighty superior to the G-2 and G-6. It is the equal of the 190A-5, superior to the A-8 and F-8, and is inferior to the Ta-152 and 190D.