1. Should I give up hard-work faking my name, my number, my email, etc., and just submit into KYC stuffs to make life easier?
If exchanges find out that you're faking your name and your KYC details, best they can do is freeze your assets and close your account. You're also going to be blacklisted from their exchange. If you can handle that happening to you then I guess you can still create fake names/KYC and get on with whatever you're doing.
2. Issue-A: Having a hard time buying coins without submitting into KYC entities. If I go peer-to-peer markets, its so expensive.
Issue-B: Having a hard time cashing out without submitting into KYC entities.
For the most part, exchanging your coins into cash require strict KYC as most exchanges are in compliance with what AML (anti-money laaundering) regulations they are under. You can always use bitcoin ATMs but the fees aren't worth it, IMO. Easier route is to get at least basic verification if you're not doing much trades (under $10000).
3. I dont know things about hiding I.P.s, VPNs, TOR browser, coin joining, coin mixing, etc., and Im not planning to learn and use it. So I know everything about my crypto activities are traceable because Im not techie. Does that mean I should just surrender any effort to get anonymous and just submit into KYC, because its just the same (my I.P. is not hidden, etc.)?
I've used a few coin mixing services and to tell you frankly, I'm better off without them (to each his own). I only used VPNs to watch some content that are blocked in my region and nothing else. I haven't had a single hack happened to me (apart from the bitcointalk password leaks in 15/16) albeit being connected to crypto and things about it. You'll be fine for as long as you don't do any crazy stuff on the interweb e.g. posting to much about your knowledge in crypto using your real accounts and downloading things on shady websites.
Im in a developing country here in Asia where cryptos are not illegal I believe. Im investing/trading not much, only around $1000-$1500 back and forth, circulating in my accounts.
4. Will these KYC things (submitting my documents) do any harm on me?
Nope. Read their ToS and use it against them should they do something unwanted on your details.
Yes, I know privacy is important, but it really tires me up. With this little amount, I think I wont be of a target of hackers/bad guys (a waste of time for them). Right?
Observing internet etiquette and simple privacy techniques can get you a long way with bitcoin. You don't have to be technically-inclined in order to keep yourself safe against hackers. Just don't do stupid things and you'll be fine for the most part (explained above).