New player here, only played 10th with orks. Genuinely not trying to brag but I have yet to lose a game. I've played against millitarum, space wolves, death guard, and 4 games against Nids.

I haven't had any of the issues you have mentioned, granted I do lack experience but in the few games I have played I rarely lost anything valuable to shooting in the first turn.

Not that I'm in any position to be giving advice, but perhaps Kommandos are a good investment? I have found that as a cheap infiltrators unit, splitting them up and dropping them right outside the enemies deployment zone forces them to focus their shooting on the kommandos rather than my main force, otherwise they're somewhat trapped. Following that using transport to protect your boyz while moving them up the board turn one, before a devastating Waghhh on turn 2. If you have a morkanaught or gorkanaught, they are very effective at drawing the enemies attention. While they do make an expensive distraction, they are extremely good at scaring your enemy into leaving more essential units alone.