Zardnaar
Legend
It's hard to make sense of things from the post because you either have something very off or are not giving enough info.
You mention having 8 or 10 cantrips as a tomelock without level cite snd while it follows a line about level 3 - at level 3 a warlock class can have by class - two from class - lets add two from celestial patron - and three from tomelock boon for 7 max from class related choices. They know four spells.
Compare to wizard who has 3-4 cantrips and 10 spells known at the same time (depends on subclass) and I just dont see how this adds up to more spells or more utility - different utility sure - by choosing celestial you choose to add some healing. But by the same token by choosing divination I get potent or I choose eithercabjurer or necromancy or illusion and get other things too.
I have no doubt you can build good strong warlocks. I just did not assume you could not also build good strong wizards that can hold their own. But I will take yourceord for that.
I just think the warlock is more front loaded and portend is still tied to spell slots and you want to roll high and low. It's unreliable
Warlocks always going to have agonising blast, can refresh it's slots probably casting more higher level Spells, more cantrips and can heal using the celestial in as an example.
Low level I like having more resources such as a light cleric or bard dice etc so when you run out of spells (which won't take long) you have something else to do.
What that something else is varies but the warlock, moon druid, light cleric, lore bard have more options even if it's guidance spam. Guidance by itself being more useful than low level rituals.
All of the above IMHO of course.