Kind of yeah? My friends encounter this phenomenon. It's definitely not every man but these days everyone of my female buds is in long term commited relationships and if they get approached by a guy a lot of the time they will often cite the relationship they are in before their no and these guys will keep pushing. It means that they get stuck in the most awkward situation where the guy won't leave. Those girls that have gotten angry from not having their no listened to (particularly from the frustration of dealing with this often) have risked using a stronger no saying they aren't interested or to please leave them be and there's always a really good chance the guy will try to enact some kind of revenge. Guys getting verbally abusive is the most common outcome.
Oftentimes with attractive folk there's a buddy system in play where someone will come to your rescue to end the interaction.
It's kind of a neutral thing to say be honest. This advice is usually good to give young people or people who are legitimately in a situation where it will get better like grief of a recent loss that you have mutually experienced but to a lot of people this comes across as minimizing their pain, offering an ultimately empty platitude that doesn't co-relate to their situation or as naive because sometimes things really won't get better. Sometimes you really need to find a way to survive knowing you do so under permanent duress and that requires support rather than generic advice to grit your teeth.
Therapy is a great thing to recommend but anecdotes of how one person got through depressive episodes by sheer force of will and by doing something that can seem a monumental task depending on circumstances can actually make someone feel worse.
Not saying you should feel bad here. This is a very common thing people say particularly due to mental health campaigns targeted at teens but if you are looking for overwhelming positive feedback this might not be the way.