I think that's one of the reasons I don't usually ask for critique - I have no intention of changing the piece I'm showing my critics and the only thing I'd want out of it is an impression of my art skills in general so I know what direction to head in for the future. But if I don't respond to their particular criticisms and change that particular piece, I'll get paranoid about them thinking I'm being an ungrateful bitch who's ignoring their advice :'D
Yeah, I definitely felt powerless as a beginner. And I didn't need critique for that either; I could see the difference between my work and professional work without anyone pointing it out for me. Tutorials didn't help with the powerlessness either; for me it was less that I couldn't make my pics look right; I knew in theory I could make a faithful rendition of anything if I really wanted to, pixel by pixel.
It was that doing so would have to take herculean effort; combing through countless tutorials and references, editing and re-editing over and over again, perhaps spending months just for one image that didn't even have fancy shading or lighting. Imagine what I thought when I'd heard that even 1 minute of animation consisted of hundreds to thousand of images :'D
I felt like I wasn't getting any faster. When skilled artists say they can do it quickly after decades of practice, that just felt so long to me. Now that I'm older, a decades feels like nothing; I'm totally unfazed by the prospect that my comic will probably take a decade to complete 
I totally feel less powerless now that I'm more experienced; I don't really feel the lack of resources because I just don't feel like I need any. As my art skills improved, so did my analytical abilities and if I feel like there's something off about my art, I can usually figure out why - if not immediately, then after sleeping on it a bit.
Maybe it's because I'm not in a rush to improve, or fix my art; if I actually kept track of things, I'd probably realize I actually take months to figure out what was wrong with my art, but it doesn't feel like a long time because my attention was elsewhere. I've got more things going on in my life now than I did as a kid; back then, I was pretty much always bored and didn't really have much to do except draw, so it was more frustrating when I couldn't turn around my failures immediately because I'm stuck in time with my failure with nothing else to occupy my attention XD
I totally feel you on the 'people thinking you're an ungrateful b!tch who was probably just fishing for compliments' think though :'D I've been on the other side too, where I've been trying to give advice to someone but it never seems to help, but I do try to actually figure out what the person was trying to go for and only dismiss them if they refuse to work with me and answer my attempts to clarify my understanding of their vision.
In general, I think critics need to realize that people's art problems aren't that easily solved; they've most certainly tried that 'obvious' solution you're about to suggest; and just because they've told you your suggestion didn't really help doesn't mean they never intended to listed to you to begin with. (I might not be one to talk though; it's not like I put in the effort to help many people these days, partly because I realize how labour intensive it is to properly listen and everything)
I know I've been fighting you in that other thread wrt (in)sincerity, but tbh I also can't bring myself to participate in 'support culture' XD I try not to give other people shit for doing it (I operate on the assumption that when people say they like their friends' work and think you should check it out, they do genuinely mean it), but I myself am a picky bastard and know for a fact that I will be acting insincerely if I proactively supported most people I talk to, and I myself don't like being 'supported' (I like people to interact with me because they feel like it, not because 'it's so hard being an artist these days so we artists need to stick together' or something :'D)
I don't think my general attitude towards critique has changed that much tbh; I can feel irritated about critique that doesn't really help with what I'm going for, but I actually consider critique to be somewhat of an ego boost, especially if it's unsolicited XD It's like 'wow, this person took time out of their day to engage with my work, without being asked!' Even if it's super negative and they say they hate my work in every way, I still kind of get a rush out of it
(Unless their critique is moral rather than technical and they're saying I'm a terrible person for how I made the art, in which case it makes me very sad and I'll probably cry :'D)
That's not to say I've always taken criticism in stride though; I've definitely reacted defensively to criticism as a beginner
(I think I responded to a solicited online critique with something like 'if i'm so bad then ...' (I honestly can't remember the rest of it but that's a turn of phrase I'd never use these days XD))