@5ee5potKill 
"Can I also see you try to defend the bird vs garlic? Stop being a fanboy. On top of all the awful things we've been served for $40 including freezing every 10 minutes, even simple character balancing are entirely absent."
Fanboy of what exactly? My reply had no mentioned of Deadbeard or other characters. It's just merely me looking at the bigger picture of things and trying to make it fair to all players while explaining why I think they made it this way.
But hey, I get it... You assume that because I tried to defend the design behind it that I'm Deadbeard fanboy in your head. I never said that or implied that. Those Red Flashing had been implemented for a reason.
"1. No, don't tell me how I "now" have to use the mines in specific purposes"
No, I haven't told you do anything, really. I just expressed my opinion towards the topic only.
"You proved my point that the only way to get a kill is to put the mines around corners "
Even if you put them in the middle of nowhere without the flashing reds, players who died or seen others die from mines previously will always pay attention and destroy them, regardless. Hence why placing them around corners is one of the most optimal ways to deploy them. People who don't pay attention will often fall to it. It seems like you've been to games where others destroy them easily. After playing many games, I automatically associate seeing a cactus to seeing drones and having mines around and most players place them in obvious locations easy to spot.
"Defending you while sniping" since people can easily see them whereas the barrel can one shot anyone in defense."
Defending you = as I mentioned, if enemies had to shoot them, you'll hear them. Heroes like Super Brainz will get damaged if they jumped towards you while those mines are around and this is the hero you want to keep away, mostly since you can't win in close-quarters. You can also fight around them to lure enemies towards them.
I'm not comparing Cactus vs Deadbeard. This is an asymmetrical game where each character on both teams aren't equal to each other.
"I should not have to use upgrades to make the only attack ability this character has even remotely viable. I assure you, everyone loves walking to the choke points and putting mines down and walking back, then sniping the enemy around them just so the health bar can be displayed to teammates and get assists."
You can do that in Loggy Acres, for example, before the attacking team arrives. You don't have to go to chock points while the enemies are there, you know. This game is all about teamwork and everything you do to assist your teammates contributes to winning. Displaying enemies' health bars eases that process for everyone.
Also, why so serious? Cactus and snipers in general are viable and useful for their main weapon, mostly. Everything else is like a cherry on top.
* Edit: Added horizontal lines to improve readability.