No, your character build is not beyond repair
the guide to S.P.E.C.I.A.L.
Info status: Published | Jan. 5, 2020, 2:25 p.m.
Quite often new players are worried that the decisions they made initially with their characters will prevent them from being any good. There doesn't seem to be any way to undo bad move initially, but there is one after you reach level 51.
In the first 50 levels you receive a SPECIAL point and a Perk Card every level. Additionally, you receive perk card packs - on levels 2, 4, 6, 8, 10. Afterwards, you receive Perk Card pack every 5 levels (15, 20, 25 and so on). After level 51, you get to choose - you can either unlock another perk card, or transfer one your SPECIAL points from one stat to another. You continue to receive Perk Card packs after level 50, with the same frequency, every 5 levels.
If you look at your character and you say "damn, this is a mess", it doesn't mean the best thing you can do is to start new one, this time without making mistakes. If you don't start new one, you can keep using your maxlevel gear, you can keep looting maxlevel gear, and you keep progressing your character, and it might be more efficient to gain levels as "acceptable" high level than as "minmaxed" low level. I have trained multiple characters for multiple purposes, but my main one has been a gunslinger, a shotgunner, a rifleman, a guerilla, and is now a shotgunner gain, but vastly different than previous one. It has accumulated a ton of plans, ton of convenience perks, and has been fun to turn around in so many shapes.
It is recommended to use 3rd party character planners in games like this. The one I find the easiest to use is available under: https://nukesdragons.com/fallout76/perks
It saves the build data directly in a link, so you can just copy this link and it will always store appropriate information.
The other one I think is nice is https://www.falloutbuilds.com/
It also allows the builder to add an article to the build publication, making it easier to transfer not only the build, but also the guidelines.
There are certain niches in this game. Focusing on single niche and aligning everything else towards it is generally speaking vastly more efficient than any forms of hybridization. For example, it's not good to be sniper that sometimes uses melee backup, because if you'd focus on being a good sniper, you would never need a melee backup. Here you'll find more about different niches in Fallout 76