So I've been playing almost 2 weeks.
I prefer 1v1 as Commander Jerome.

My biggest issue is finishing games. It seems as if I can't get a handle on finishing my opponent even when I dominate the map.

It doean't help that half of my matches are with Smurfs so I barely get a chance to play. That or they drag me around while expertly handline units and I struggle to counter anything.

Half rant, half needing tips. Air is a problem too. Full Wolverine armies barely finish the job and leave me with a useless pop for base push.
I'm starting to see my mistakes. It's getting better.
Ive had the same issue. Ive had a few games where I mostly take over the map yet as soon as I loose a few units, the enemy seems to have an infinite number of resources and production and pushes me back to my base.

So Ive learned to push/rush with Jerome yet not all the way, not to full risk but just to keep the pressure, get some snipers on the vehicles and slowly have the enemy bleed out. Its a matter of patience.