There is definitely a hump in this game when going from lower ranks to higher where you start to run into people with mythical beams, and get absolutely trashed… it’s often the first thing people max on their mech… it’s up to you to decide if you want to grind and get your own equipment up to speed, or to just give up now.
In a week or two when you have level up your own modules these beam people won’t be a problem but you will have the same issue with people who have maxed legendary/myth items that you don’t have yet.
Now I have a fully fused energy mech and am finally hitting rank 2… still running into people who obliterate me. It’s a long hard climb up but just keep leveling your shit and you will improve.
Also I got most of my epic/leg/myth energy and heat engines from grinding ramboy on normal difficulty, this is what I suggest if you need to find some of these.