Problems 1 and 2 are problems on swipe apps and Instagram (if a man wants to send DMs).
The swipe apps are an absolute waste of time, this is because there are dudes out there swiping right 100% of the time, considering that men outnumber women on those apps often 4-8:1 it means that a woman's feed is constantly full and when you consider the math of the situation, she is not even getting shown you to swipe back on you most of the time because she doesn't have hours a day to sit there and swipe through the 400 dudes who swiped right on her.
Instagram is another story, man I have had so much luck there, it isn't hard to get a woman to talk to me there but the problem most men face on IG is they are trying to talk to accounts that have 10k+ followers, those women aren't even checking their DM's or reading their comments.
When a woman has a smaller account and is local to me, I can usually at a minimum get a conversation going with her if she posts regularly, but the secret here is starting by commenting on what she is sharing and making it a genuinely interesting interaction to her before diving into DM's.
When she remembers your PFP from comments, she will read your DM.
This is true. However, being 6'0"+ and fit/muscular gives you more leeway with this. A man doesn't need as much going for him on the personality side if his looks are good enough. However, personality can give some small assists in seduction. @BPH is a great example of this. He has shown in some field reports that his emotionally centered personality (where he doesn't let women's behavior affect his frame) has helped him seal the deal and get pussie. His 6'0" height and above average physique got him in the door and captured women's interest but without his frame, he would have been less likely to get same night sex/app arranged first date sex in some of these field reports.
I am 6'1" and I used to power lift in high school, then was in the navy where I became an Aircrewman which means going through a lot of physical fitness training, and then after the military I have stayed incredibly strong doing physical jobs well into my 30's including running a welding shop for several years.
Being big and strong is great, but it can be a double edged sword, I am big enough and strong enough that people are scared of me when I do nothing, if I am in Seattle walking through a more residential neighborhood, grown ass men will cross the street if they are walking towards me.
Never mind the fact that I am well dressed, or that I am not behaving in a threatening manner, they are just scared of my size and strength.
It has actually made it harder for me meeting women in person because a woman who is 5'2" wearing 4" heels is still 7" shorter than me, 9" if I am wearing my cowboy boots.
My hands are so large I can literally catch a basketball by it's top.
When I go ashore and wind up in a public setting, especially say taking the light link rail or something like that, I can feel an awkward bubble pop up around myself, people will turn so their gaze will not meet mine, some will switch seats.
What is interesting is I can go out with a woman who is dressed with her tits hanging out, looking fine in something that hugs her curves, and she will notice how much less men look at her, how they are afraid to and what is interesting is they seem to enjoy that being the forbidden fruit that the weaker men are not allowed to look at.
But it does mean when I approach a woman in public it can also scare the **** out of her. And mind you I don't want this, it is just a function of my size and confidence.