I don't think LeFHs get used in 1v1 at all.
And in team games they are - map dependent - very effective. Laney maps with lots of 'blocked' space like Angermunde get absolute spam fests.
you would be suprised how many times the OKW player simply wins the game agaisnt me by getting lucky at 1 vs 1 with his howitzer even if he is at a territorial disadvantage
like this is not a L2P issue at all even if kick his ass on almost all engagements he just gets lucky with the LEFH 18 and just one shots my ambulance and then i have to re buy it which then leads into a snow balling effect