Vyx.
Nobody is disputing your experience. Nobody is telling you that you haven't experienced what you have.
What people are disputing is the secondary claim you are making - that your experience is
universal. That ALL assault 'mechs will lose, 100% of the time, to ALL light 'mechs because
you tend to lose more often than you like against
most light 'Mechs. You are trying to claim that your experience grants you authority, whilst denying that anyone else's experience grants
them authority. That other people's experience with not having trouble with light 'Mechs as an assault driver is somehow incorrect, or that a light 'Mech pilot's experience of having to work drastically harder for their damage don't matter.
I've been spending a lot of time in light 'Mechs recently. Mostly my
MLX-PRIME(I) HMG blaster, but have also been spending some time in my ol' Sabre, kitted out for
Commando-esque SRM brawlishing. I've got a
Beamspam Supportifier kitted up as a general overwatch machine I've been putting more time into recently, as well. The key thing with
my own experiences with all of them is that I have to be
super picky about my engagements. I cannot afford to slip up, even once - if I do I'm usually mission-killed even if I survive, left too crippled to have any realistic impact on the fight. If the enemy balls up densely and refuses to scatter, I'm often helpless in anything but the Cute Fox.
Sabre
absolutely relies on the enemy screwing up and diffusing enough to give me an isolated target to pick on, because even with its durability quirks that 'Mech
cannot stand in the brawl and trade punches. The Meth Linux is somewhat better, given its almost absurb level of armor quirking and the extra survivability its smaller silhouette and jump capacity give it - plus, of course, its Piranha-esque levels of 'Mech-chewing DPS - but even in the Meth Linux (my best-performing light 'mech by far) I have to be super canny, cautious, and paranoid. I
can win duels with assault 'Mechs in the Meth Linux...if the assault driver is a bad shot and/or rattled by my machine gun fire, and if the assault 'Mech is alone. Very,
very rarely, I can manage a brief -
brief - dive into a lance-sized or smaller pack of targets to try and harvest an exposed leg or shoulder, but generally only if the lance in question doesn't know I'm coming until I'm there and is not particularly well-suited to dealing with light 'Mechs.
One,
single, blap from a gagglebananas LB50/X Annihilator and I may as well rub some salve on it at home because I'm officially out of the match. Wander in front of a heavy goose Fatnir for half a second too long and I'm either spiked dead in an instant or I lost half the 'Mech - and that's with the Meth Linux's heavy,
heavy armor quirking. Walk around the corner into the front side of a Fatlas and I'm not sitting there going "Ohhhh, juicy crotch, let's sniff it and get a free kill!" I'm going "#&@*$^@#*(&$^&(*@^$#(*&@&$ ABORT ABORT REDIRECT COURSE BE ELSEWHERE NAO PLZ
AHHHHHHHHHHHHHHHH"
That's
my experience - and I'm down here in the lowbie tiers where light 'mechs are disproportionately dangerous because nobody in T4 can shoot for beans. Yes, I
can poke assault 'Mechs - but it's a super fraught, deeply uncertain experience that ends with me in a smouldering heap telling myself that I got what I deserved pushing my luck as often as it ends with a dead assault 'Mech. And frankly, I'm in the weight class that's
supposed to be good against assault 'Mechs.
You ask "why would anyone buy an assault 'Mech when they could buy five Locusts, instead?!" Because the two Centurions you could buy for the same five Locusts will eat the Locusts alive. Light 'Mechs existed, so they made medium 'Mechs to prey on light 'Mechs. Then medium 'Mechs existed, so they made heavy 'Mechs to prey on medium 'Mechs. Then heavy 'Mechs existed, so they made assault 'Mechs to prey on heavy 'Mechs. They woulda made superheavy 'Mechs to prey on the assault 'Mechs, but
that didn't work out so well and they discovered that enough light 'Mechs could prey on the assault 'Mechs. And thus the circle was complete. It's the same reason why real-life militaries don't use nothing but cheap, disposable weapons instead of spending a ton of money on heavy ground armor - there are some jobs only the ground armor can do, and the heavy ground armor's vulnerability to guerilla attacks is mitigated with proper screen and escorting.
Assault 'Mechs are not meant to be undisputable, unkillable, invincible Lords of the Battlefield. They're meant to be anchor points, tankbusters that punch holes in the enemy's formation and control space by being the biggest baddest thing in that space. if you hang them out to dry, or if you're in one and you hang yourself out to dry, they get eaten alive by superior mobility and numbers -
as they should. The game would be extremely boring if assault 'Mechs were unstoppable monster beasts that outright dominated every other 'Mech in the game the way long-time assault drivers all seem to feel they should. To turn the question back around...why bother with anything below assault at that point, eh? Why not just force everyone into an assault 'mech and be done with it?