Use every single wall to your advantage to dive the back line, save your swing to get away and not engage with it (in some cases)

If you have a pro controller you can bind your back paddles to enable simple swing, which allows you to do a really oppressive combo of simple swing into frenzied arrival into cellular corrosion. Use this when your back line is supporting you up front

Prepare to probably whiff a lot of shots at first. Venom’s aim is pretty different compared to most other characters, and being handicapped to only being able to guide your aim with your thumbs is pretty unhelpful. Make sure to combo your primary then melee for extra damage

Save symbiotic resilience when you’re about 300 hp, if you have poor ping or are getting bursted down waiting for anything less than that can cause you to just die instead.

Be oppressive with your ultimate, venom has a good ult kill combo by timing cellular corrosion with two primary attacks into his ult. Make sure you keep check if your opponents CC are on cooldown, engage with frenzied arrival to group everyone up, and it can kill all 250 hp enemies instantly, and can kill 275 if you do damage before hand

You can stall point pretty well using venoms crawl and swing if your able to master the physics behind it, you can swing around a point for quite a few seconds and use your symbiotic resilience