IMO you can't really screw up a punter. you can temporarily screw up a punter, but stick with it and you'll reach relevance again at like lvl 35 or so with the right eq. See my punter (lvl41) is INCREDIBLY efficient (is just a punter, not a PK) and is probably one of the worst builds ever. Most of the reason is cuz his team picks him up, but even a great punter in this situation couldn't do much better. I go by net avg and my net this season is 35.8, the net of some cross conference rivals are 33.2, 23.0 (man their punting game sucks lol), 33.1 these are all top teams in my division and I trump them. All punt bars are equal to me (72) except the last one is a 69 (goes to show the best builds don't necessarily mean jack when you got an efficient special team that can tackle the return man in time making you look good

the best punts are kicked out of bounds anyway...).
Here is how I made my punter (basically I didn't know anything) the normal clueless noob way of TONS of sa's. But that's good! you know why? cuz punters don't normally have 3, 4 downs to work with, they only got one. So you need your SA to be unusually HIGH so it triggers 95% of the time, not just 2 or 3x a drive. You may only get 1 or 2 punts in a game! Anyway what this does is it takes away from your immediate skills. In fact if you don't do it right those bonuses can remain stockpiled and latent there for a number of lvls before you can even use them!! but anyway you may suck up to lvl 35 but I am living proof that a punter with a crap build can easily be ST 'MVP' simply because his supporting cast is awesome. Hang in there, develop a plan (that I didn't have until a few seasons ago anyway) and, unless Bort nerfs the punter- which imo he SHOULD do and this is why... but there's really no way around it, you'll be just fine. Use some networking skills, be a proper agent

punters aren't the top priority of most teams so getting good with a good team shouldn't be very hard.
I mean heck, I got Automatic to 3 (yes an extra SA JUST IN CASE I am made to kick lol... nothing better to do with that anyway) and don't even use my VA's! (15 pts into motivational speaker and 3 pts into that pulling offsides one that doesn't even work on punters... in the offseason I spotlight as a wanabee QB ;p). OFC I do have custom equipment that helps a TON... but. Another thing, buy custom equip and you'll be fine. Boosting helps too.