Pure healing is honestly a trap for solo combat on Adept and up - you're right to feel that itch. But there are a few things that actually work if you commit to the playstyle instead of trying to DPS with Restoration.
First, the perks matter way more than people admit. Get the one that lets you dual-cast spells for increased effect (not sure of the exact name, but it's early in Restoration), then stack the ones that reduce casting cost. Once you're not bleeding magicka dry, healing becomes viable as your main action. Pair that with the perk that makes healing spells work on allies at range - that's your actual combat role. You're not soloing dungeons; you're keeping followers alive while they do the work.
Second, don't sleep on Restoration's other half. Cure Disease, Cure Poison, paralysis removal - these aren't flashy but they trivialize entire enemy types. Combine that with heavy armor and a shield, and you become unkillable. You're playing a tank-cleric, not a DPS.
Third, Restoration scales with Restoration skill, not Magicka, so leveling it actually makes you stronger. Get that Necromage perk from the Dawnguard questline (the one where you side with vampires) - it's like a 25% damage boost to all magic if you're a vampire. Broken in the best way.
On Switch you're stuck with vanilla perks, which is rough, but the core idea holds: commit to support, grab followers who can actually fight, and use Restoration to enable them. You won't feel useless if you're the reason they're alive.