Anecdotal experience and all that, but even when people start tracking food, it's pretty common for them to fudge the shit out of their eating habits during the tracking period or to lowball their intake amounts. Like what is clearly almost 2 cups of rice would be entered as 1 cup, etc. So then they go "Oh hey I only need to drop 500 calories, looks like I'm eating one less bowl of oatmeal a day!" when they are consuming a lot more.
One of the cooks who used to work for me was always telling me about how he's keeping super good records of what he's eating, and then complaining that he wasn't losing weight. I asked him if he was walking around tasting stuff in the kitchen (he damn well should have been hah) and if he was accurately measuring his intake. So he shows me his phone with his intake app, and according to it he was at a 700 calorie deficit. Then I saw some of the entered amounts and I'm like "You ate almost double this at lunch; I was there. And you are adding way more than a tsp of sugar to your coffee and you have like 5 of those a day, yet you're logging 1tsp per." "Oh it doesn't have that much of an impact."
Same guy also would log his stuff (relatively inaccurately) all week, then conveniently finish to come to a conclusion before the weekend, where he'd go out and drink/eat stuff and then complain on Monday that he hasn't lost any weight. He was also guilty of drastically changing his eating habits while taking his "average" and then going back to way different amounts/intake after he came up with what he should be cutting out. Eventually I just started ignoring him when he'd bring it up and stop trying to help hah.
Keeping a realistic and accurate record of what you are eating, even with apps, is probably just as difficult as the dieting itself for some people. It's like when I see people saying "I only used one slice of cheese!" then they show me their slice.
I'm just eating a salad!
Whereas when I hear salad I think "vegetables" some people think "all sorts of random shit" (don't get me wrong, I love me some thick salad action with all kinds of fun stuff on it. But reporting it as "I just ate a salad" is super misleading and makes for inaccurate portrayals)
I completely get the frustration and tediousness for some people regarding accurately portraying their meals, especially when asking for outside advice. Without accurate information, however, it's really hard to toss out meaningful advice.
TLDR; Keep a log of what you eat, but be honest about it or you simply aren't going to see accurate results. And don't change your eating habits while logging to find a baseline, or you end up with the same problem.