I disagree. I’ve been playing him in public matches for a long time and right now I have zero defeats with him, even after several premades. So I think it’s safe for me to say that he isn’t a bad monster. He’s honestly the most balanced, the most fun for both sides.
Goliath is different to others in that he absolutely one million per cent requires good map knowledge and smart map movement. You have to know where you’re going, the best way to get there, and the escape routes; you have to count down the planet scanner CD (approximately) and you have to be using every single leap and leapsmash/charge to the optimum otherwise you’re done for.
In combat, Goliath players absolutely need to be on point with ability accuracy, combos, positioning, choosing very good places to fight and being aware of the whole team and their placements and deployables. If you fight in an area where they can juke you…You’re at a massive, massive disadvantage. Avoid a lot of incline changes. Avoid pillars they can strafe. Avoid areas with tight spaces and easy escape points.
Once you’ve chosen a good place to fight, you need to know your combos. Rock Throw is his hardest hitting power, but it’s very obviously telegraphed and a little slow and easy to dodge. Which is why you combo it.
Leap Smash into Rock Throw is absolutely golden, so is Charge Rock Throw (but the former is better, I’d say) and after that, use fire breath as a mop up tool. Save fire breath for when he’s on lower health, running from you, your abilities are on CD and he’s trying to juke you by going around things, over things, under things, into things, etc.
Take advantage of the stun from your attacks and lead abilities in order to ensure hits, and always, always keep pressure on Medic and Support.
For example if you focus Hank only, Medic’s going to have a field day healing over and over with little issue, Hank’s going to use his shield busts and Trapper will CC you. But if you focus on Hank and Medic simultaneously, yes, you’re initially doing less damage, but you’re fighting such that neither of them can sit cool and calm and use their abilities to the absolute optimum; you’re forcing them to play worse because they’re being knocked around, and you’re forcing them to make mistakes.
That’s basically all I can say, sorry if it’s not much or not helpful.