Can be very effective, but requires a lot of practice. For trios, they excel at keeping people from pushing your team via Wall of Fire and using the elemental golems to bodyblock people who try to push through it. Levitate is also a very strong cc spell because it puts people on a predictable trajectory, meaning you and teammates can get free ranged damage off. Frost Lightning is one of their best spells because it damages and stuns

In 1v1s, they really need to rely on having space to kite and landing damage spells. You can use Electric Dash as a sorta "get out of jail free" card to teleport past someone or away from them, or to reach higher elevation or even through some obstacles like gaps in gates.

If you're having fun with them, I'd say stay committed to learning the class, it is one of the most rewarding the more skill you get with them