Any advice would be welcome

[fishfight]

Frustrating when you can see the fish but no takers. Always happens to me as well. Hard for fish to bite when weather is sunny and hot, now that you located the fish, fish at night or early morning, use lures that makes lot of noise, or top water ones. The vibration on the lure will entice them. Since you were fishing Toronto GTA waters, also lot of boat traffic, I presume those pike have seen them all. Spoked in most cases.